Billionaires Fund Fight Against California Wealth Tax

Prominent figures in venture capital and technology are collectively contributing millions of dollars to oppose California's Proposition 40, a proposed one-time wealth tax. Campaign finance records reveal that Peter Thiel, cofounder of Palantir, Chris Larsen, cofounder of Ripple Labs, Google cofounder Sergey Brin, and venture capitalist John Doerr have donated to political action committees actively campaigning against the ballot measure. Proposition 40, if passed, would impose a 5% tax on the wealth of billionaires, with the aim of generating an estimated $100 billion for California over five years. These funds are largely earmarked for healthcare (90%), with the remainder allocated to food assistance and education. For an individual with a net worth of $1.1 billion, the potential tax liability under Proposition 40 would be $55 million, according to an analysis by Wealth Management.

Chris Larsen has personally contributed $5 million to Golden State Promise, a committee specifically established to oppose Proposition 40. His company, Ripple Labs, has also made a $5 million contribution to the same committee. Another anti-Proposition 40 committee, which purports to represent teachers, doctors, and small businesses, has received $5 million from Building a Better California. The primary donors to Building a Better California are identified as Sergey Brin and John Doerr. Furthermore, Golden State Promise has received $450,000 from the California Business Roundtable Issues PAC. Peter Thiel is listed as a significant donor to this PAC, having personally contributed $3 million to it.

The opposition to Proposition 40 is being framed as a critical battle over the state's fiscal policies and its attractiveness to high-net-worth individuals and businesses. The substantial financial backing from these billionaires underscores their significant opposition to the proposed tax. Peter Thiel, who officially severed ties with California in 2025, prior to the proposed tax, and Sergey Brin, who has also reduced his official and financial connections to the state, highlight a trend of some of Silicon Valley's most influential figures distancing themselves from California amidst increasing tax proposals. The outcome of this ballot measure in November is expected to have significant financial implications for the state and its wealthiest residents, potentially influencing future investment and residency decisions within California.

This organized financial opposition represents a direct challenge to California's legislative efforts to address wealth inequality and fund public services through a wealth tax. The campaign against Proposition 40 is leveraging significant financial resources to influence public opinion and electoral outcomes. The debate extends beyond the immediate financial impact, touching upon broader economic philosophies regarding wealth taxation and its potential effects on economic growth and individual incentives. The involvement of figures like Mark Cuban, who has publicly engaged in discussions surrounding the merits and drawbacks of taxing billionaire wealth, further illustrates the high-profile nature of this debate.