Social Security remains a crucial part of retirement income for millions of Americans. Since its creation in 1935, it has been amended several times due to demographic shifts and economic pressures. Understanding both its history and its current challenges helps us anticipate reforms and prepare for the role it will play in your retirement plan.
A Brief History
Social Security was created in 1935 during the Great Depression as Old-Age and Survivors Insurance (OASI), designed as a form of “social insurance” to protect against poverty in old age, unemployment, and the burdens on widows and children. At the time, poverty among seniors exceeded 50%.1 The system was designed as “pay-as-you-go,” meaning current workers’ payroll taxes funded current retirees’ benefits. In the early years, shorter life expectancies, favorable worker-to-retiree ratios, and modest benefits made the program highly sustainable.
During the 1940’s and 1950’s, Social Security expanded to include coverage for the self-employed, nonprofit workers, farm workers, domestic workers, and eventually most of the workforce. Disability Insurance (DI) was also added during this period, and the program became what we now know as Old-Age, Survivors, and Disability Insurance (OASDI). Also, women were able to retire at 62 with a reduced benefit, and by 1961 this option was extended to men. In 1965, Medicare and Medicaid were added under the Social Security Act.2 While Medicare is administered separately, its creation reinforced Social Security’s role as the foundation of retirement security.
Reforms and Resilience
The OASDI trust funds came under strain in the 1970’s as stagflation (high inflation, unemployment, and slow growth) took hold. In 1972 lawmakers tied Cost-of-Living Adjustments (COLAs) to inflation, but a formula error (“double indexing”) caused benefits to grow much faster than revenues. By 1977, amendments were passed to raise payroll taxes and fix the COLA formula.3
By 1982, the trust funds were projected to run out within a year. Amendments passed in 1983, based on the Greenspan Commission, were enacted only three months before Social Security would have become insolvent.
These amendments included:
- Gradually raising the full retirement age
- Accelerated payroll tax increases
- Taxing benefits for higher-income retirees 3
These changes stabilized the program and built-up large reserves. For decades, those reforms provided confidence that the system would remain secure. But as baby boomers retire and demographics shift, the program is once again under strain.
Today’s Challenges
From the mid-1980s through 2020, Social Security consistently collected more in taxes and interest than it paid out, allowing surpluses to accumulate in preparation for the baby boomers’ retirement. Since 2021, however, the system has been drawing down those reserves to cover benefit payments. Without additional reforms, the trust funds are projected to face depletion within the next decade.
According to the 2025 Trustees Report, which projects the next 75 years, the Old-Age and Survivors Insurance (OASI) trust fund is expected to be depleted in 2033. At that point, the program could still pay about 81% of scheduled benefits, gradually declining to 72% by the end of the projection period. The Disability Insurance (DI) trust fund, however, is projected to remain solvent.4 While the two funds are often referred to together as OASDI, any transfer of assets between them requires an act of Congress, something lawmakers have approved in the past during funding crises.
Several factors explain why the system now faces this shortfall:
- Worker-to-retiree ratio: In 1960, more than five workers supported each retiree; today, that ratio has fallen to three, and it is projected to drop below 2.5 by mid-century.5
- Longer life expectancy: At age 65, people live about 50% longer than they did in 1940, meaning retirees now collect benefits for decades rather than just a few years.6
- Wage cap on payroll taxes: In 2025, Social Security taxes apply only to the first $176,100 of wage earnings. As income inequality has grown, a larger share of workers’ earnings falls above that cap and goes untaxed.
Paths to Reform
To address these pressures, Congress has a limited menu of options, each with trade-offs for workers and retirees.
Commonly discussed reforms include:
- Eliminating or raising the wage cap so that more earnings are subject to payroll tax.
- Increasing the payroll tax rate, for example from the current 12.4% to 16.05%, which would fully fund scheduled benefits through 2099.7
- Raising the full retirement age from 67 to 68–70, reflecting longer life expectancies.
- Reducing benefits for higher earners by lowering replacement rates (currently 15%) while preserving protections for lower-income retirees.
