California is on the cusp of introducing a revolutionary wealth tax targeting billionaires, sparking heated debate among economists. The proposed tax, known as Proposition 40, would impose a one-time 5% tax on the net worth of billionaires, with some assets exempted. Economist Gabriel Zucman, a leading advocate for taxing the superrich, supports the tax, estimating it could raise about $100 billion in revenue. Zucman's analysis, co-authored with Jasper Boll and Emmanuel Saez, found that California billionaires' wealth has reached $2.3 trillion, with a 144% increase between 2023 and 2025.
On the other side of the debate is Stanford economist Joshua Rauh, who argues that the tax could lead to an exodus of billionaires out of California, damaging the state's economy and reducing income tax revenue. Rauh estimates that Proposition 40 would cost the state $39 billion, contrary to Zucman's projection of $100 billion in revenue. The stark difference in their analyses has significant implications for California's tax policy and potentially for the nation.
The proposed wealth tax is designed to address the issue of rising inequality and the fact that billionaires often pay relatively little in income taxes. Zucman argues that the existing tax system allows the superrich to structure their finances to generate little or no taxable income, making the income tax rate "totally irrelevant." He believes a wealth tax will help counteract the political power of "the oligarchs" and raise much-needed funds for everyone else.
The debate over California's wealth tax has garnered significant attention, with the superrich pouring $333 million into a group trying to defeat the proposition. The tax would apply retroactively to any billionaire who was a resident of California on January 1, 2026, and the revenue would be earmarked mostly for the health care of low-income Californians. Economist Zucman notes that a crucial problem with past wealth taxes was that they had loopholes that allowed the rich to shelter their assets.
Rauh points to the failure of past wealth taxes, citing France's experience as a cautionary tale. Before France scrapped its wealth tax in 2018, it exempted qualifying business assets, including shares in companies their owners ran, which drastically reduced the amount of revenue it raised. Another problem with wealth taxes is that some superrich people move to avoid the tax, which could happen in California if Proposition 40 is passed.
The stakes are high, with California voters deciding whether to pursue a historic wealth tax experiment that could influence tax policy around the nation and the world. Zucman believes that if California successfully implements a wealth tax, it will pave the way for a federal wealth tax and potentially an international movement. The outcome of the debate will have significant implications for the future of tax policy in the United States.
As Election Day approaches, Californians will have to weigh the potential benefits and drawbacks of the proposed wealth tax. While some argue that it will help address rising inequality and fill the state's coffers, others fear that it will drive billionaires out of the state, damaging the economy. The decision will have far-reaching consequences, not just for California but also for the nation and the world.
Key points
- Economist Gabriel Zucman estimates that the proposed wealth tax could raise $100 billion in revenue.
- Stanford economist Joshua Rauh argues that the tax could cost the state $39 billion.
- The proposed wealth tax has sparked a national debate on taxing the superrich.
