Can the US Actually Tax Billionaires?

Episode Summary

Executive Summary: The episode examines whether the US tax system can still effectively tax wealth as inequality grows, AI may shift income from labor to capital, and progressive Democrats propose new taxes on billionaires. Bloomberg's Caitlin Riley and economist Jason Furman debate wealth taxes, constitutional limits, capital gains loopholes, inheritance tax politics, and more workable alternatives like higher income, capital gains, and corporate tax rates.

Main Topics: Taxing the wealthy in US politics (Priority: 5/5): The discussion centers on how live the issue is on Capitol Hill and within Democrats, especially as future campaigns may revive wealth-tax debates and broader plans to fund social programs amid rising debt. Why the current tax system misses wealth (Priority: 5/5): The guests explain that the US tax code relies heavily on wages while wealth is often held in capital gains, estates, or corporate equity that is taxed more lightly or deferred indefinitely. Wealth tax proposals and their limits (Priority: 5/5): They assess proposals such as a 5% annual billionaire wealth tax and California’s one-time billionaire levy, weighing revenue goals against behavioral responses, capital flight, and constitutional obstacles. More practical tax reforms (Priority: 4/5): Furman argues that raising ordinary top income rates, capital gains rates, and the corporate tax rate would be easier, lawful, and likely more effective than a wealth tax. Step-up basis, unrealized gains, and borrowing against assets (Priority: 4/5): The conversation highlights mechanisms that let the ultra-wealthy avoid taxation, including stepped-up basis at death, unrealized appreciation, and borrowing against assets instead of selling them. Political unpopularity of estate and inheritance taxes (Priority: 3/5): The hosts discuss how inheritance taxes remain unpopular even when most voters are unlikely to pay them, with the estate tax exemption rising to $15 million per person in recent policy changes. AI and the future tax base (Priority: 4/5): The episode closes by asking whether AI could shrink the labor share of income and make taxing capital more urgent, though Furman says wage income will remain dominant for years.

Key Arguments: The US tax system is increasingly less effective at taxing wealth because wealth is concentrated in capital income, estates, and unrealized gains rather than wages. Jason Furman argues the tax code is still progressive overall, but less so than before because corporate, capital gains, and dividend taxes have been reduced. Wealth taxes may fail both to raise revenue and to reduce inequality if mobile capital simply leaves a state or country. A national wealth tax faces a major constitutional challenge because the Supreme Court would likely view it as an unconstitutional direct tax. Furman favors simpler reforms: higher top income tax rates, higher capital gains rates, higher corporate taxes, taxing accrued gains, or taxing gains at death. Adjusting step-up basis, taxing unrealized gains, or limiting borrowing against assets could reduce tax avoidance and also reduce economic distortions from locked-in capital. Caitlin Riley notes Democrats increasingly see taxing the wealthy as central to financing ambitious social programs and responding to debt pressure. AI may reduce labor’s share of income and raise capital’s share, making questions about capital taxation more important over time. Public support for taxing the wealthy is broad in principle, but it drops sharply when people consider specific proposals like inheritance or wealth taxes.

Data Points: Billionaire wealth tax proposal: 5% annual wealth tax - Discussed as a proposal from Bernie Sanders and Rep. Ro Khanna California ballot proposal: 5% one-time tax on net worth over $1 billion - Referenced as a state-level billionaire tax initiative Top corporate tax rate: 35% to 21% - Furman cited the decline as a major reason the system is less progressive Top income tax rate: 37% - Furman said it could be raised by several percentage points without major harm Potential capital gains rate: 28% - Suggested as a straightforward reform Estate tax exemption: $15 million per person - Mentioned as having been raised in the “Big Beautiful bill” Top wealthiest households tax comparison: Top 400 wealthiest households paid a lower effective tax rate than the bottom 50% - Cited from research by Emmanuel Saez and Gabriel Zucman Current labor share of income: 70% - Furman used this to argue wage taxation will remain important Possible labor share in 10 years: Below 50% (he said he’d be shocked) - Used to frame AI’s potential impact Possible labor share in 30 years: 30% - Furman offered this as a long-run possibility

Pivotal Quotes: "I am quite skeptical of both of those proposals." — Jason Furman: His reaction to the 5% billionaire wealth tax and California billionaire tax "Most constitutional scholars would agree that the current Supreme Court would rule wealth taxes unconstitutional." — Jason Furman: His explanation of the legal barrier to a national wealth tax "If you hold things, you don't pay it. And there's different ways of getting at it." — Jason Furman: His explanation of why taxing unrealized gains and related reforms matter

Implications: The debate suggests wealthy households will face growing scrutiny, but the most workable reforms may be incremental tax changes rather than headline-grabbing wealth taxes. AI, inequality, and debt will likely keep capital taxation at the center of policy fights.