The "fiscally irresponsible" states provide more tax dollars to the federal government than the "fiscally responsible" states, all of whom would be completely insolvent without the extra tax dollars they receive from the federal government.

The fair alternative to not eliminating the SALT cap would be to allocate federal dollars spent by the amount of tax dollars paid by the citizens of that state. But then every GOP state would be insolvent, so obviously that's not going to happen.