Mark Cuban said a proposed California billionaire wealth tax from Rep. Ro Khanna (D-CA) was "insane" on Monday [1].
The dispute highlights a growing tension between progressive tax proposals and the venture capital ecosystem that fuels California's tech economy. If implemented, such a tax could alter how founders manage equity and where they choose to base their companies.
Cuban targeted the plan's focus on unrealized gains, the increase in the value of an asset before it is sold. He said the proposal would force startup founders to pledge illiquid shares to the state to cover tax bills on paper wealth [1], [4]. This mechanism, Cuban said, would create an unsustainable burden for entrepreneurs whose wealth exists primarily in company stock rather than cash [4].
During the public exchange, Cuban said to Khanna that the representative does not understand business [5]. He said the policy would push tech investment out of California and said he would move his money out of the state if the measure passes [5].
Other financial figures joined the criticism. Bill Ackman said the government could garnish wages for life under such a framework [2]. The debate centered on whether taxing the wealthiest residents is a necessary step for state revenue or a catalyst for a mass exodus of high-net-worth individuals.
Khanna's proposal aims to target the state's wealthiest residents to fund public services. However, Cuban said that targeting founders specifically would stifle innovation by penalizing the growth of companies before they reach a liquidity event [1], [4].
“"That's insane."”
This clash underscores the volatility of California's tax environment for the tech sector. By targeting unrealized gains, the proposal challenges the traditional 'founder's journey' where wealth is accumulated through equity growth rather than salary. If high-profile investors and entrepreneurs follow through on threats to relocate, the state could face a significant loss in both tax revenue and the venture capital activity that sustains Silicon Valley.
