'They Are United': California Democrats Move Forward With 5% Billionaire Tax
In a development that will stun absolutely no one, the California Democratic Party's roughly 380-member executive board gathered at a waterside Sheraton in San Diego this weekend and voted to endorse Proposition 40 - a "one-time" 5% levy on the net worth of the state's roughly 200 billionaires - clearing the 60% supermajority required for the party's official blessing, three months before voters render judgment on November 3.
If it passes - California residents on January 1, 2026 whose net worth is $1 billion or more on December 31, 2026, will owe Sacramento a nickel on every dollar. Directly held real estate is largely excluded - which means the drafters carved out the one asset class that cannot board a Gulfstream. The measure originated with a major healthcare union, the Service Employees International Union United Healthcare Workers West (SEIU-UHW), which claims it would raise $100 billion to offset what it calls deep healthcare funding cuts under the Trump administration. Progressive lawmakers, including Sen. Bernie Sanders and Rep. Ro Khanna, have cheered it on. SEIU says it will raise about $100 billion, mostly to backfill federal healthcare cuts, with some crumbs earmarked for education and food assistance.
The arithmetic: $100 billion at a 5% rate assumes roughly $2 trillion in billionaire net worth sitting obediently in Atherton and Bel Air through year-end, marked to market and liquid enough to cut nine- and ten-figure checks to the Franchise Tax Board.
“I strongly support the grassroots effort in California to impose a 5% wealth tax on 200 billionaires worth $2 trillion,” Sanders said of the tax. “This is a model that should be emulated around the country, which is why I will soon be introducing a national wealth tax on billionaires.”
Yes: We need a wealth tax on billionaires. pic.twitter.com/2OUwSos5De
— Bernie Sanders (@BernieSanders) December 30, 2025
The weekend itself was democracy at its most catered. The union threw a hospitality suite and handed out hats and T-shirts celebrating the confiscation of other people's balance sheets, while the "No on Prop 40" campaign - whose ranks include the California Medical Association (yes, the doctors oppose the measure written to fund them, calling a one-shot levy a flawed answer to a recurring hole), though its real bankroll is one Google co-founder, of whom more below - reportedly picked up around $7,000 in hotel rooms and travel for select board members via a hired consulting shop. Both sides whipped votes like the leveraged proxy fight it effectively was.
Afterward, the union's president declared that the endorsement settles the question of Democratic unity on the measure. Sure - minus the sitting Democratic governor, the party's own candidate to replace him, the California Teachers Association, and the state's firefighters. When even the teachers' union calls a tax too much, that tells you something.
Gavin Newsom - a man who never met a revenue stream he didn't like until it threatened his 2028 ambitions - has suddenly discovered the Laffer curve, warning that the state's largest taxpayers might simply leave.
After the measure qualified in June, he and his allies leaned on the union to pull it. The union's counteroffers tell you everything about the shelf life of "one-time": days before the June 25 withdrawal deadline, it publicly offered to swap the 5% levy for a 2% version Newsom would push through the Legislature - he passed - and, per the LA Times, union chief Dave Regan separately offered in private negotiations to pull the measure outright in exchange for help securing union contracts at several medical facilities - a demand he denies making. The temporary tax was, from birth, a down payment. Meanwhile, Bernie Sanders and Ro Khanna cheer from the sidelines - neither of whom, we note, will be writing a check. Newsom, for his part, now stumps for a federal wealth tax - one billionaires can't dodge by moving - which concedes the entire case against this one.
In May, one of the co-authors of California’s controversial tax appeared to suggest that the levy could extend beyond a single imposition. Marxist economics professor Emmanuel Saez, who hails from France, made the comment during a heated debate against economist Arthur Laffer at the University of California, Berkeley
“I don’t think it’s going to be a one-time tax. Because you can’t surprise billionaires more than once,” Saez said. "Even then, maybe some of them were expecting something like this. So, it’s going to be a debate about this time, you know, a permanent wealth tax at a low rate that’s going to last for a number of years.”
How These Taxes Usually End
Do these people ever learn? Recall New Jersey circa 2016, when a single hedge fund manager's change of address to Florida had Trenton's budget officials publicly sweating over the state's revenue forecast - one guy, one moving truck, one fiscal panic. Recall Illinois' richest resident, Ken Griffin, packing his entire firm off from Chicago to Miami in 2022, taking what was reportedly the state's largest individual tax bill with him. Recall the Pacific Northwest's most famous ex-resident developing a sudden fondness for South Florida in 2023, mere months after Washington's shiny new capital gains tax survived its court challenge - and then unloading billions in stock from the comfort of a state that taxes none of it. Recall the world's richest man decamping California for Texas in 2020, with his companies trailing behind like ducklings.
And it's not just an American genre. Norway hiked its wealth tax in 2022 and promptly watched a procession of its wealthiest citizens establish residency in Switzerland. France ran the grand experiment for decades, bleeding tens of thousands of millionaires across its borders, until Macron finally euthanized the ISF - preserving, in the ultimate irony, a wealth tax on real estate alone, the one thing that couldn't flee. Prop 40's drafters studied that lesson and inverted it: exempt the immovable, tax the mobile.
California, of course, has been talking itself into this outcome for years - the 2023 wealth-tax bill with its infamous reach-back provisions for former residents died in committee, but the memo was received loud and clear in Austin, Miami, and Incline Village. The state lost a congressional seat after the 2020 census for the first time in its history, net domestic outmigration has been running for years, and the top 1% already supply north of 40% of state income tax collections. The geese aren't just laying the golden eggs; they're carrying the farm.
About that Incline Village entry: Sergey Brin decamped to the Nevada side of Lake Tahoe last year - safely ahead of the January 1 snapshot - and has since pumped roughly $82 million into the No side's war chest, a committee called Building a Better California that has raised north of $118 million from fewer than a dozen donors, with Peter Thiel dropping a separate $3 million on the California Business Roundtable, the lobby anchoring the institutional opposition. Nor did Brin leave alone: at least six billionaires got out before the residency date locked, clipping an estimated $27 billion off the projected haul before a single ballot was printed. Every anecdote in the genre now has a live, hometown edition - the man whose fortune was minted in Mountain View is bankrolling the fight against a California tax he has already arranged not to owe.
The trap already snapped shut: because residency was fixed on January 1, 2026, leaving now won't dodge this levy if it passes - that trap closed eight months ago. What leaving now does is guarantee you're not around for the sequel. So expect a December blizzard of trust restructurings, charitable pledges, and valuation disputes over illiquid private stakes, followed by a constitutional bar brawl that keeps white-shoe litigators billing well into the 2030s. Collecting 5% of a private company position from a founder newly domiciled in Texas will be a spectacle.
Polling shows a strong majority of California Democrats on board and a narrower majority of the overall electorate - which is to say, this thing can absolutely pass. The No campaign calls the measure "bad for our budget, bad for our economy and bad for our future."