Like other tax proposals, California voters on Nov. 3 test-drove a tax on billionaires

Like other tax proposals, California.

Key points

• For Mississippi, columnist Sid Salter notes Proposition 40 is less a model than a case study.
• Whatever the outcome, Proposition 40 deserves scrutiny beyond California since it raises a question with national implications: Can a state tax accumulated wealth rather than annual income?
• Special elections in Mississippi House Districts 70 and 77 head to runoffs.
• He is Vice President for Strategic Communications at Mississippi State University.
• Social Security and Medicare: The promise America created and the bills we postponed.

Like other tax proposals, California voters on Nov. 3 test-drove a tax on billionaires. By: Sid Salter – November 4, 2026.

For Mississippi, columnist Sid Salter notes Proposition 40 is less a model than a case study. "Our state's economy depends heavily on homegrown entrepreneurs who build family businesses over generations. Whether you agree or disagree with California's approach, Mississippians should watch closely."

California voters on Nov. 3 decided whether or not to approve Proposition 40, a ballot measure that would impose a one-time 5% tax on the net worth of Californians with more than $1 billion in net worth and employ the proceeds largely to fund health care programs.

At this writing, the results were unknown. On the eve of the election, the prediction markets and independent polling suggested the measure would narrowly fail. Let's hope so. The election's outcome will be a real test of the relatively new prediction markets.

But supporters asserted the measure could generate roughly $100 billion over five years. Opponents called it a dangerous precedent that taxes wealth rather than income and could drive investment and taxpayers out of the state.

Whatever the outcome, Proposition 40 deserves scrutiny beyond California since it raises a question with national implications: Can a state tax accumulated wealth rather than annual income? Whatever the outcome, other states are probable to take their own crack at wealth taxes.

For generations, American tax policy has operated on familiar ground. Governments tax what we earn, what we purchase or apply, what we inherit, and the property we own. Proposition 40 ventures into largely uncharted territory by taxing net worth itself.

Meanwhile, the proposal is carefully targeted. According to California authorities, it would apply only to residents who were billionaires as of Jan. 1, 2026. The state's legislative analysts estimate that only a few hundred individuals would be affected.

If Mississippi adopted a California-style wealth tax tomorrow, the affected taxpayers would fit in a phone booth. That fact highlights a central challenge of wealth taxes. The tax base is extraordinarily narrow. When a state relies on a small number of ultra-wealthy taxpayers for considerable revenue, even minor changes in residency, investment strategy, or asset valuation can have significant fiscal consequences.

Supporters view concentration as a virtue. They argue that billionaires have accumulated immense wealth in a system that disproportionately benefited them and that asking them to contribute more during a fiscal crisis is both reasonable and fair. Proposition 40's backers contended that the revenues would support offset looming health care funding gaps and sustain critical services.

Critics see another danger. They argue that wealth taxes differ fundamentally from income taxes since they require the administration to value privately held businesses, startup shares, intellectual property, partnerships, and other hard-to-value assets. Opponents additionally warn that taxpayers may relocate or restructure their holdings, reducing future revenue.

Then there is the legal question. If Proposition 40 passes, court challenges are virtually guaranteed. Lawyers will test whether California can constitutionally tax net worth in this way, particularly when wealth is tied to businesses and investments spanning multiple states and countries. The measure is projected to face challenges on due process, interstate commerce, residency, and asset valuation.

Yet those predicting an straightforward judicial defeat may be overstating their case. States have long enjoyed broad authority to tax their residents. Courts generally defer to legislatures on tax policy unless a clear constitutional violation is present. The stronger judicial challenges are probable to focus not on the concept of wealth taxation itself, but on how the tax is applied and administered.

That distinction matters. The greatest threat to Proposition 40 may not be a judge with a gavel. It may be economics. A number of European countries experimented with wealth taxes over the years, only to modify or repeal them against the backdrop of reservations over complexity, capital flight, and competitiveness. Even a constitutionally valid wealth tax can fail as public policy if it yields less revenue than projected or produces unintended economic consequences.

If California succeeds in collecting tens of billions while withstanding judicial scrutiny plus avoiding a significant exodus of taxpayers, wealth taxes will gain credibility nationwide. If the measure collapses against the backdrop of litigation, valuation disputes, or economic backlash, it may become a cautionary tale.

Either way, Californians weren't merely voting on a tax measure. They conducted a national experiment, and the rest of America, including Mississippi's two billionaires, are watching. Regarding the Author(s).

Sid Salter is a syndicated columnist. He is Vice President for Strategic Communications at Mississippi State University. Sid is a member of the Mississippi Press Association's Hall of Fame. His syndicated columns have been published in Mississippi and a number of national newspapers since 1978. Opinion Laurie Todd-Smith October 27, 2026.

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Taken together, the developments around like other tax proposals, California voters on Nov. 3 test point to a situation that is still moving, and the coming days should bring more clarity.