No responsible person in or out of politics wants to cut Social Security benefits. That means no cut for any person receiving benefits and no cut to any benefits already earned. That leaves little room to make the program solvent and sustainable except to raise revenue.
The Committee for a Responsible Federal Budget calculator indicates that after removing the cap on taxable wages Social Security remains insolvent. The trust fund will run out in 2067 at which point all beneficiaries will face a sudden 14% benefit cut. Only 76% percent of 75-year shortfall is closed (34% of shortfall closed in 75th year).
Clinton and others propose this change as a way to expand benefits. This begs the question how one uses the same money to do two separate things while not solving the main problem; making Social Security totally and permanently sustainable.
If we are going to fix Social Security, let’s fix it rather than making more promises not paid for and requiring ongoing future changes. It can be done. Make the program self adjusting to remain sustainable as circumstances change in the future.