Planet Money : NPR

Key Points:

• California voters are considering Proposition 40, a proposed one-time 5% wealth tax on billionaires' net worth, aiming to raise about $100 billion for low-income healthcare, marking the first wealth tax of its kind in the U.S.
• Economist Gabriel Zucman supports the tax, arguing it will curb inequality and generate significant revenue without major billionaire flight, citing Norway's long-standing wealth tax as evidence of limited exodus.
• Stanford economist Joshua Rauh counters that the tax could prompt billionaires to leave California, reducing income tax revenues and potentially causing a net loss of $39 billion for the state due to departures and legal challenges.
• The debate hinges on legal interpretations of residency, retroactive taxation, and asset valuation, with billionaires already spending over $333 million to oppose the measure amid fears it could spark a national wealth tax movement.
• California's strong tech ecosystem and agglomeration effects may retain some billionaires despite the tax, but concerns remain about its impact on startups, investment, and the broader economy if the tax passes.