Two Confusions About the California Wealth Tax

Unrealized capital gains aren’t classified as taxable income in the U.S. for good reason

Letter to The WSJ. 

"At least two confusions discredit Mayra Castañeda’s attempted defense of California’s proposed wealth tax in her letter “Billionaire Tax Would Save Calif. Healthcare” (Feb. 4). She claims that “billionaires pay less in taxes on their overall wealth than working families do.” She gets away with this because the research that she cites, although it postures as measuring the taxation of incomes, in fact measures the taxation of paper wealth by classifying unrealized capital gains as taxable income.

But unrealized capital gains aren’t classified as taxable income in the U.S. for good reason. Were these gains treated as such, taxpayers—including many middle-class families—would have to liquidate assets whenever tax season rolled around to pay their bills. One result, in addition to this annual hardship, would be a shrinkage of America’s capital stock which, in turn, would slow wage growth as workers, having less capital to work with, would be less productive than otherwise.

Ms. Castañeda also ignores the most prominent argument against the proposed tax—namely, that it will drive billionaires, along with their taxable incomes and wealth, to states that are less greedy to seize the fruits of high-earners’ efforts. This exodus of billionaires would occur even if, contrary to fact, counting unrealized capital gains as taxable income were a sound idea.

Prof. Donald J. Boudreaux

Mercatus Center

George Mason University"