Lawmakers debated Wednesday the merits of Democratic legislation, The Medicare and Social Security Fair Share Act, that would increase taxes to boost financing for the programs.
The bill would apply the Social Security payroll tax to wage, self-employment and investment income above $400,000.
Senate Budget Committee Chairman Sheldon Whitehouse, D-R.I., introduced the bill in April, and Rep. Brendan Boyle, D-Pa., introduced companion legislation Tuesday.
Whitehouse said in a statement that both programs are "at risk of being unable to fully pay out benefits within the next 15 years."
Without new revenue, Whitehouse said, "the Hospital Insurance Trust Fund and the Old Age and Survivors Insurance Trust Fund are expected to become insolvent in 2028 and 2033, respectively."
The bill, according to Whitehouse, "would ensure the long-term solvency of the Medicare and Social Security trust funds by reversing inequities in the tax system so that high earners contribute a fairer share."
Currently, Social Security payroll taxes are capped at $160,200 in wages. The cap is adjusted annually for inflation. Earnings above this threshold are not used to calculate Social Security benefits.
According to a summary of the bill, it would "significantly extend Social Security solvency and would extend Medicare solvency by an estimated 20 years" via several changes, including the payroll tax expansion.
The bill would also increase taxes intended to fund Medicare.
"Taxpayers with more than $250,000 in earned and investment income currently have to pay an additional 3.8% tax on income above that amount," the bill summary explains. "This legislation would increase that rate for income above $400,000 by 1.2%."