Billionaire entrepreneur Mark Cuban warned that only "idiot" startup founders would remain in California if a proposed billionaire wealth tax passes [1, 2].
The dispute highlights a growing tension between state revenue goals and the retention of high-growth tech companies. Because many founders hold wealth in stock rather than cash, critics argue the tax could force them to sell equity or relocate to avoid liquidity crises.
Cuban directed his criticism toward U.S. Rep. Ro Khanna (D-CA), the proponent of the measure. Cuban said, "You don't understand business" [2]. He said that the tax would stifle innovation by creating a cash-flow crisis for founders who are stock-rich but cash-poor [1, 3].
The proposed measure suggests a five percent one-time tax on billionaire wealth [4]. If passed, Cuban said he would shift his investment focus away from California [1, 2].
Opposition to the ballot measure has already seen significant financial backing. Reports indicate that $118 million has been raised to fund efforts against the tax [3].
The measure was slated for a November 2024 ballot [2, 5]. Cuban's comments, made in mid-August 2024, emphasize the risk of a "brain drain" where entrepreneurs migrate to states with more favorable tax climates to protect their company ownership [1, 3].
Cuban said that the policy is misguided and fails to account for how startup equity functions. He said that the tax would penalize the very individuals who drive the state's technological economy [1, 3].
“"Only idiot founders would stay in California."”
The clash between Mark Cuban and Rep. Ro Khanna reflects a broader national debate over wealth taxes and economic mobility. While proponents see such taxes as a way to fund public services through the state's wealthiest residents, the opposition argues that taxing unrealized gains creates an artificial liquidity requirement. This could lead to a systemic shift in the tech ecosystem, pushing early-stage ventures toward states like Texas or Florida where such wealth taxes do not exist.
