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The Economic Reality Behind Billionaires Taxes and State Budgets

February 06, 2026 / 09:16

This episode discusses the concept of a billionaire's tax, featuring Kent Smetters, Faculty Director of the Penn Wharton Budget Model. Key topics include the effectiveness of such taxes, historical attempts in various countries, and the challenges of implementation.

Kent Smetters explains the origins of the billionaire's tax idea, noting its appeal among political leaders as a way to address income inequality. He highlights misconceptions about the potential revenue generated from taxing billionaires, revealing that it could only fund the federal government for about 8.8 months.

The conversation shifts to the experiences of countries that have implemented wealth taxes, with Smetters mentioning that most have repealed them due to lower-than-expected revenue and economic distortions. He emphasizes the ease with which wealthy individuals can relocate their assets, particularly in states like California.

Smetters also discusses the complexities of valuing private wealth and the administrative challenges a billionaire's tax would pose. He suggests that California's ongoing budget issues may require broader tax solutions rather than solely relying on a wealth tax.

In conclusion, Smetters advocates for a combination of reduced spending and broader tax bases to address California's fiscal challenges, while reiterating the difficulties of implementing a billionaire's tax.

TLDR

Kent Smetters discusses the challenges and misconceptions surrounding a billionaire's tax and its potential impact on state and federal budgets.

Episode

9:16
00:00:00
The concept of a billionaire's tax is one that has become somewhat fashionable for political leaders in the last
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several years. They see it as a necessary way to somewhat level the playing field between the haves and the have nots.
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California is the latest state to bring this idea forward. But do these ideas work? And we asked that question and more of
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Kent Smetters, who's Faculty Director of the Penn Wharton Budget Model. He's also Professor of Business, Economics
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and Public Policy at the Wharton School. Kent, great to catch up again. How are you, sir?
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It is good to be back. Doing well. Hope you guys are doing well as well. Thank you. We are. I guess, let's start with the— I think, to
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put some background on this, the idea of a tax like this, where did it actually come from in the first place?
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Yeah, yeah. So there's— at Penn Wharton Budget Model, we did some—a little bit of surveying, as well as talking to a lot of
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business leaders and policymakers and so forth. And there's a couple things that keep coming back that both come
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from the left and the right on the political spectrum. Kind of— kind of fallacies, if you will, in terms of how to get money and
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why the budget problem is not necessarily a big problem, which is actually not true. But one of these is that, man, there's just so
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much revenue out there that we're not getting, in the form of kind of really wealthy people, billionaires. And so the simple
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idea was, okay, suppose that we actually tried to grab all that money. And so I just did a hypothetical exercise with
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policymakers, and said the following. "Listen. I mean, suppose we do the following kind of upper bound calculation."
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We say, '"All right, let's just outlaw being a billionaire. Let's
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just actually grab all the wealth above $999 million, and more nines and change. And we'll grab everything above $1 billion.
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And then let's suppose hypothetically that we could actually get it, if the money can't be moved. Let's suppose
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hypothetically that we could then sell all those assets at current market prices. That we wouldn't— you know, market
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prices wouldn't plummet. We won't be selling it at a fire sale and so forth. With— even with all that, you know, pretty— call it
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egregious, you know, extreme assumptions in terms of modeling, how much money could we actually get? How much— for
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how long could we actually fund the federal government?" And people— just the way I ask that question, people often think,
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"Okay, it must not be a big number." So they'll guess, like, you know, maybe 10 years, 15 years. And it actually turns out
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it's around 8.8 months right now. And so it's way less than what people think. And so people are just completely uncalibrated
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in terms of the size of the federal problems that we have, in terms of the size of the spending that we have, the size
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of the federal budget deficits that we have, the exploding debt path that we're on. And that lack of calibration is really on
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both sides. So I'm picking a little bit more on the left right now, but the right has its own problems in terms of how
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they're conceptualizing AI and things like that. But the assumption, I guess, is that if you were to bring a tax
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like this into play, that it would have a significant impact on reducing debt. In this case, in a state. Because it seems
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like states are the ones that are trying to move this forward here. But other countries have tried this as well.
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Yeah. And almost every country, except for three, who've tried it have gotten rid of the wealth tax. And the reason why
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is that consistently, they've found that it's raised a lot less revenue than they originally projected. And so
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over a dozen countries— including France, by the way, that's, you know, currently hot debate about this idea right
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now— had wealth taxes. They all got rid of it, because they realized that the distortions caused to the economy just way
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outweighed any revenue that they were getting. In fact, the revenue that they're actually— you know, it's way less than
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they're expecting. And that's at a country level. I mean, it's much harder to move your assets out of a country. Much easier to
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move your assets out of a state like California, especially when you think about, so much of the wealth in California is tech based.
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And so as a result of that, I mean, lots of that can be done— you know, if I'm an owner or founder of one of the big tech
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companies, I can easily move my domicile to another state. Right. You can go from California to Nevada or Utah, or wherever else
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you wanted to go. - Or Texas. There's Texas. Yeah. Exactly. One of the things, though, I guess you also have to consider, is the cost of
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running a program like this. Correct? It is, it's— here's the— what makes it a little bit
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different than other programs, and that is, usually, when it comes to things like income, even a sales tax, things like
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that, it's pretty clear what you're measuring. The problem with wealth is that a lot of wealth is not publicly traded.
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It's not marked kind of daily. Yes, your 401(k) accounts and your other, you know, taxable accounts are marked pretty
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frequently in terms of their value. But that's not true for— with a lot of wealth owned by billionaires. A lot of it's very
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private. And the last marking of that wealth, even if it's venture backed— I mean, that last series that might have
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been— you know, that evaluation was established— was maybe a couple years ago. And so it actually is not marked very
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frequently. So here's the problem, is that I could actually be a billionaire and not actually know it. And so
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what happens if my company does take off in value? My next funding round, I go from $100 million valuation to a $2 billion
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valuation. And then when it was only worth $100 million based on a pretty dated funding round, you know, the government
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says, "No, no, no. That was really worth— you know, in the intermediate time, it was really worth a billion dollars. You
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should have— you should have been paying taxes on that." And so as result, you're going to have a lot of people having to
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do these valuations just in case, so they don't commit tax fraud or get accused later. So anybody who is hopeful that
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their company's gonna pop in value, unless you just had a really recent funding round, you better be doing these valuations
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a lot, and including everything, including your jewelry, your property, private property, everything— a house should be
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marked and valued. And that's a really tough exercise to do. So I think we've laid out the case where a billionaire's tax
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is very tough to kind of pull off. So then, what are some of the other options potentially out there that need to be
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considered in order to deal with the level of debt that we are seeing, not only at the federal level, but at the state level as
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well? - Yeah. So, California has had this problem for several decades, where their revenue bounces around a lot through the
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realization of capital gains. And the problem is— in fact, this happened just a couple years ago. Big revenue increases
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because of realization of capital gains, especially during COVID and so forth. And so what happens is that they will
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project this out and say, "Hey, you know what? We're gonna get all this fancy revenue going forward, and we're gonna spend
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that money." So they put themselves on a spending path going forward that is assuming this revenue comes in, even
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though their own equivalent of the CBO, called the LAO, warns them that that's not true. They still do it anyway. So they get
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this big mismatch between spending and actual revenue coming in. And this has happened multiple times before in
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California. So ultimately, unless they get that spending down, they're gonna have to get revenue up. A wealth tax is gonna be very
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hard to do it. And so it's— you're back to your classic means of more income taxes, which already is pretty high in
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California, especially at the high end. You know, put the highest marginal tax rate in California added to the federal
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rate. Those people are actually paying the majority of their income in taxes. And so over 50 cents on the dollar in taxes. So it's
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already fairly distorting. So there's pretty much no option in California outside of really broad-based taxes like a more
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aggressive sales tax, a value- added tax, something of that nature, where they're going to get more— a lot more revenue.
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They're going to have to do some combination of bringing the spending down. And if they, in fact, want more revenue, it's
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going to have to be very broad- based. Kent, always great to talk with you and get your insight. Thanks
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very much. Pleasure. Thank you. Kent Smetters, who is Faculty Director of the Penn Wharton Budget Model, and also
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Professor of Business, Economics and Public Policy here at the Wharton School.

Episode Highlights

  • The Billionaire's Tax Debate
    Exploring the viability of a billionaire's tax and its implications for revenue generation.
    “How much money could we actually get?”
    @ 02m 25s
    February 06, 2026
  • Challenges of Wealth Valuation
    Kent Smetters explains the difficulties in accurately assessing billionaire wealth for taxation.
    “You could actually be a billionaire and not actually know it.”
    @ 05m 45s
    February 06, 2026

Episode Quotes

  • How much money could we actually get?
    The Economic Reality Behind Billionaires Taxes and State Budgets
  • You could actually be a billionaire and not actually know it.
    The Economic Reality Behind Billionaires Taxes and State Budgets
  • A wealth tax is gonna be very hard to do it.
    The Economic Reality Behind Billionaires Taxes and State Budgets

Key Moments

  • California's Proposal00:14
  • Wealth Tax Failures03:33
  • Valuation Challenges04:48
  • Revenue Mismatch in California07:12

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