“The rationale behind capping the SALT deduction was that it would disproportionally benefit high-income earners in high-tax states—and it did. In effect, the federal government was subsidizing the tax-and-spend policies of these states by shielding residents from the full impact of local tax increases. If California raised its taxes, the SALT deduction softened the blow for taxpayers.”
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“raising the cap on SALT deductions would ease pressure on blue states to simplify or lower their tax rates. Consider that California’s top marginal rate is a whopping 13.3 percent. When combined with a top federal rate of 37 percent, Golden State residents are approaching a Sweden-level tax rate. Meanwhile, seven states impose no state income tax at all. This dynamic highlights the beauty of the American political system—the states compete for talent and resources. Over time, high-tax states will lose capital, and low-tax states will benefit.
It’s difficult to oppose any proposal that lowers taxes, but an exception applies here. Raising the SALT cap would only reward high-tax states for their fiscal irresponsibility while undermining the competitive pressures that drive reform. Cities like Nashville, Austin, and Miami are thriving as new hubs of innovation precisely because they’ve embraced freedom and pro-growth policies. They’ve earned their success—and that’s the lesson high-tax states need to learn.”
https://reason.com/2024/12/18/raising-the-salt-cap-is-a-gift-to-high-tax-states