To the casual reader the Tax Foundation’s recent SALT Cap opinion piece likely leaves the wrong impression that the Tax Foundation is not a champion of tax provisions benefiting high earners. Data provided by the Joint Committee on Taxation (JCT) for the SALT and Mortgage Interest Caps was a projected saving of $668.4 billion vs the Alternative Minimum Tax (AMT) Relief costing $637.1 billion (within less than 5%). IRS data indicates the ratio of high earners benefiting from the AMT relief is multiple times that of the pre-TCJA SALT deduction.
The Tax Foundation championed the, supply-side AMT Relief stimulus and on its website leads reader to believe that the SALT Cap paid for lower tax rates, but the JCT projections leading up to the passage of the TCJA of 2017 clearly indicted a direct relationship with capping the demand-side SALT deduction stimulus.