They were paid to other retirees at the time. Some excess dollars were loaned to the government for general spending, which put Treasury bonds into the "social security trust fund." You in turn received credit that entitles you to receive similar payments when you retire, paid for by then-working taxpayers and by repayment of those bonds (which also comes from tax revenue.) As other posters mention, the democratically-elected government could change the law so you aren't paid those benefits: if that bothers you, you should avoid voting for politicians that want to change the arrangement.