Who subsidizes whom?

California politicians are worried about their taxpayers’ new inability to offset against their Federal taxes:

The Republican-backed federal tax bill flipped the tables on a never-ending question for California politicians: Will high taxes lead the state’s wealthiest residents to flee the Golden State for the comparable tax havens of Florida, Nevada and Texas?

Republicans reliably raise that alarm when Democrats advocate for tax increases, like the 2012 and 2016 ballot initiatives that levied a new income tax on very high-earning residents.

But now, with the federal tax bill cutting off deductions that benefited well-off Californians, the state’s Democrats suddenly are singing the GOP song about a potential millionaire exodus.

“People with higher incomes pay a lot more money, and some of them may be tempted to leave,” Gov. Jerry Brown said when he unveiled his 2018-19 budget proposal last week. “This was an assault by the Republicans in Congress against California.”

That fear animates Senate President pro tem Kevin de León’s bill that would allow California residents to write off their state taxes on their federal returns as a charitable deduction, as well as other proposals that Assembly leaders have hinted they’re preparing to offer. De Leon’s bill cleared a second committee this week and is on its way to a vote on the Senate floor. Trump administration officials say it won’t pass muster with the IRS.

Democratic state lawmakers are worried because California relies so heavily on the income taxes it collects from high earners to fund government services. The state’s wealthiest 1 percent, for instance, pay 48 percent of its income tax, and the departure of just a few families could lead to a noticeable hit to state general fund revenue.

“It is a genuine concern and that’s why the legislatures in high-tax states are swinging into action immediately,” said Katie Pratt, a professor at Loyola Law School in Los Angeles who specializes in taxes.

The new federal tax law poses problems for high earners in the Golden State because it caps two deductions that Californians used to limit their federal income tax liability, restricting their ability to write off mortgage interest and their state and local taxes.

Come now. Every time the issue gets raised in Minnesota, the newspapers produce one argument after another to explain why people don’t move based on tax rates. Because great schools! And art! And people!

Of course, since liberals and progressives are totally incapable of keeping two thoughts in their head at the same time, the fact that moving a bunch of Mexicans and Somalis might degrade the value of those competing factors never occurs to them.