https://miro.medium.com/max/1127/1*86sURhsiwekHqCuqjbFnkQ.pn...
https://worldpopulationreview.com/state-rankings/donor-state...
California is a net recipient of federal money (though not by a lot). The biggest donors are the blue states in the northeast. But plenty of blue states are recipients and the biggest recipients are the swing states, because politicians shamelessly buy their votes.
And the reason the states in the northeast pay the most isn't because of state-level benefits reducing the need for federal programs (which rarely if ever happens). It's because those states are disproportionately the wealthy people who pay the most taxes.
But getting rid of the SALT deduction didn't care about that. Wealthy people in California lost more than equally wealthy people in New Hampshire, even though California is a net recipient and New Hampshire is a net donor, because New Hampshire has lower state and local taxes.
But then they weirdly push for the opposite to the financial detriment of their own constituents, including the lower income ones who could have higher state benefits than existing federal benefits if the feds weren't taking so much of their state's money.
Best guess for why this happens is that the blue team is more captured by government sector lobbyists at the federal level, who don't want to lose jobs to state level government workers.