People forget how much was going right in the 90s. Boomers were in their prime working years, paying into Social Security instead of collecting it. Women’s participation in the workforce had hugely expanded. Also a decade of strong economic growth and job creation meant more people working, lower unemployment, and more money going into the system. It allowed the US to briefly reverse the decades-long decline in the number of workers supporting each Social Security beneficiary, and then kept that ratio stable for a while. Obviously some of that was demographic luck, but the Clinton economy was actually putting people to work.