Because believe it or not, Social Security was to be just that. The government, at the time lead by the Dems, decided to use what all Americans were paying in for their idea of Social needs. Welfare, etc. Also, have you not been paying into the system your entire working life? It’s YOUR money, less a lot of interest that the Government was supposed to pay you on it.
What I think she is saying is “Don’t worry, be happy”.