Social security was never supposed to be reimbursement of money you paid into the system. It's always been a system of transfer payments - reimbursement of money other people paid into the system. That's why it worked: when it was instated, there were many more people paying into the system than receiving benefits.

The sooner people realize that, the sooner they can come to terms with its eventual bankruptcy. That's why I hate it when people repeat the myth that you're supposed to get out what you put in. It'll make for a very rude awakening when you don't.