The proposed California "entrepreneur's tax" is not a one-time levy on billionaires. It's viewed as the first step toward an annual tax on paper wealth, with thresholds planned to drop to $25M. This would impact founders with illiquid equity post-Series B, forcing a mass exodus before an IPO.

Will Monitis argues Boston's tech ecosystem was killed by a combination of hostile regulations (like non-conforming QSBS rules and a "millionaire's tax"), an insular VC culture, and a flawed belief that top universities alone guarantee success. This serves as a direct warning to other tech hubs.

Mark Cuban warns that a California wealth tax would compel him to make startups leave the state as a condition for investment. This isn't just a threat of founders leaving; it's a structural shift where venture capital actively drains talent and future tax revenue from jurisdictions with hostile policies.

California is on the verge of a massive tax revenue surge from upcoming IPOs of companies like SpaceX and OpenAI. However, a proposed wealth tax on illiquid assets is causing tech leaders to relocate, potentially costing the state the very economic boom it needs to balance its budget.

Rather than increasing revenue, wealth taxes incentivize the wealthy to leave, shrinking the tax base. As seen in New York, this forces the government to eventually broaden the tax to lower income brackets to cover the deepening deficit.

When states or nations impose wealth taxes, the wealthy often relocate, as seen when New York's governor told them to leave. This erodes the tax base. Since government spending rarely decreases, officials are forced to broaden the tax to lower income brackets, ultimately increasing the burden on the middle class.

Ben Horowitz warns against wealth taxes on unrealized gains by citing Norway's experience. The policy required founders to pay taxes on their private company's rising valuation with illiquid stock, leading to an exodus of entrepreneurs and effectively dismantling the local tech ecosystem.

Threatening to confiscate wealth from the most mobile people incentivizes them to leave. This capital flight has already begun in response to the proposal, proving such policies ultimately reduce the state's long-term tax revenue by driving away the very people they aim to tax.

According to Mark Cuban, a wealth tax would trigger massive capital flight. He and other investors would require startups to relocate out of states like California as a condition of investment. This preemptive move would starve the state of its next generation of high-growth companies, destroying future tax revenue.