LOS ANGELES — California's ambitious tax proposal aimed at billionaires has ignited a political storm in Silicon Valley. While tech titans threaten to relocate, Governor Gavin Newsom is maneuvering to defeat a tax measure that could trigger a massive outflow of wealth.

The state, home to more billionaires than any other in the nation, relies heavily on top earners for nearly half of its personal income tax revenue, which is essential for its nearly $350 billion budget.

The tax, spearheaded by a prominent health care union, is designed to impose a one-time 5% tax on the total assets of billionaires – including their stocks, real estate, and other valuables – as a way to replenish funding sources for health services that have faced cuts.

As high living costs and increasing economic instability loom over California ahead of the midterm elections, both Democrats and Republicans are grappling with the political implications of a growing income gap.

An intense online battle has emerged with tech leaders like Peter Thiel pledging millions to oppose the tax. Yet, there's no certainty that the proposal will even reach the ballot, given the requirement for over 870,000 valid signatures from voters.

Threat of a Wealth Exodus

If put into effect, the tax would challenge a mere fraction of California’s 39 million residents but would extract significant wealth from the state's economy, raising concerns about its attractiveness to business leaders and innovators.

With at least 25 billionaires associated with the state listed in Forbes' top wealth rankings, the definition of their residency could become contentious.

CEO Aaron Levie warns: “You are playing with fire; the proposed tax could prompt entrepreneurs to consider running their startups elsewhere.”

Governor Newsom, who is against state-level wealth taxes, fears potential repercussions on California’s economy, especially as he considers a future presidential run. Analysts warn an exodus of billionaires could lead to substantial losses in tax revenues as well.

The situation has led to a divide within the Democratic party. Progressive factions, led by figures like Senator Bernie Sanders, support the tax as necessary for equity while challenging Newsom’s stance.

Critics of the measure, including the California Business Roundtable, argue that such a tax could severely disrupt the state's economy and provoke investment flight.

With California’s reputation for high living costs and tough regulations already driving some away, the proposed tax may hasten the trend. Elon Musk, who moved Tesla to Texas, exemplifies a growing list of tech leaders migrating to states with more favorable business climates.

As prominent figures like Larry Page and Sergey Brin look to relocate their investments away from California, the proposed billionaires tax continues to stir debate within a state grappling with its financial future.