Senator Bernie Sanders is back doing what he does best: calling out billionaires. This time, the Vermont independent is using California's brewing wealth tax battle as his platform, accusing the ultra-rich of spending millions to kill a ballot measure rather than simply paying what he calls their "fair share."

The War of Words and Wallets

In a Wednesday post on X, Sanders declared that the "billionaire class is on the warpath against working families," taking direct aim at opposition ads targeting a proposed 5% tax on fortunes exceeding $50 million. His solution? "Instead of spending tens of millions on ads against a wealth tax, we have a better idea: Start paying your fair share of taxes."

Sanders backed up his rhetoric with infographics singling out tech and finance heavyweights including Larry Page, Sergey Brin, Mark Zuckerberg, Elon Musk, Larry Ellison, Eric Schmidt, Peter Thiel and hedge fund manager Bill Ackman. The graphics juxtaposed their reported net worths—ranging from Ackman's $9.2 billion to Musk's staggering $847 billion—with lavish spending on $300 to $450 million super-yachts, Miami and London mansions, flying cars and even a private Texas city.

Sanders is in Los Angeles this week headlining the campaign for the Billionaire Tax Act, a November 2026 ballot measure that would slap a one-time 5% levy on roughly 200 California billionaires. Supporters, led by SEIU-United Healthcare Workers West, estimate the plan could generate about $100 billion to bolster the state's healthcare system and prevent hospital closures amid severe federal Medicaid cuts.

California Dreaming, or Nightmare?

The proposal has split Democrats down the middle. Governor Gavin Newsom has publicly opposed the tax, arguing it could trigger capital flight, expand an already massive projected budget deficit, and damage California's competitive position—all while he considers a potential 2028 presidential run.

The opposition isn't just political posturing. Some of California's wealthiest residents are putting serious money where their concerns are. Google co-founder Sergey Brin has contributed $20 million to Building a Better California, an opposition group that has raised at least $35 million from tech and agribusiness leaders to fight the 5% levy and related measures, according to campaign filings. A recent report from Business Insider shows billionaires have already begun shifting assets and even changing residency out of California as the tax battle intensifies.

The Numbers Behind the Noise

Sanders argues the warnings about capital flight miss the bigger picture. A recent analysis by Americans for Tax Fairness, drawing on Forbes data, found that US billionaire wealth jumped 22% in 2025—a $1.5 trillion increase bringing total billionaire wealth to approximately $8.2 trillion. Meanwhile, IRS data shows the top 1% of earners already pay roughly 40% of federal income taxes, a figure opponents frequently cite to argue the wealthy are already carrying a heavy tax burden.

The California clash is just the latest chapter in a years-long national debate over taxing extreme wealth, including Sanders' previous proposals for federal wealth taxes and his ongoing criticism of Trump's tax changes that independent analyses suggest disproportionately benefit high-income households.