Does closing Social Security's gap with higher payroll taxes hurt growth?
Core argument: Keeping Social Security permanently solvent under the "fairness" model of paying accrued benefits in full would require an immediate and permanent payroll tax increase from 12.4% to 17.6%, which would decrease labor supply and reduce economic growth.
Imagine that Social Security reform follows the fairness model, in which accrued benefits are paid in full but the rate at which future benefits are earned is reduced. A simple way to do this is to increase the payroll tax rate To keep Social Security permanently solvent, meaning through 75 years and beyond, would require an immediate and permanent increase in the payroll tax rate [from] 12.4% to 17.6%. The higher rate would decrease labor supply and reduce economic growth. [Consider] an alternate reform, which looks clearly unfair: fix Social Security’s funding gap entirely by reducing accrued benefits that Americans already have earned. As of 2025, Americans had accrued $54 trillion in Social Security benefits. Social Security’s unfunded obligation as of 2025 was $26 trillion. So, roughly, this means cutting Americans’ “earned benefits” in half. [Analyzing the 1977 reform that undid the notorious 1972 “double-indexing” of benefits, a group of economists], using SSA earnings data, found that, for every dollar of lost benefits, the affected Americans increased their earnings by 61 cents. Moreover, these additional earnings would be taxed by Social Security, further strengthening the program’s finances. In effect, this makes cutting benefits a “cheaper” way to fix Social Security than raising taxes, because people respond in ways that also increase tax revenues.


