If this is eliminated then states effected should permit federal taxes to be deducted from income for state taxes, otherwise you have double taxation. Extreme example: Pay 51% in state taxes, 50% in federal— take out loan to cover the extra 1%. I thought this was why they implemented SALT.
Your income is already taxed more than once at the federal level. You pay income tax on all income and then both the FICA tax and the Medicare tax on your earned income.