said by bmn :

The problem is that the Congress has been taking money OUT of the social security fund and dropping little IOUs into the fund for years...

said by pnh102 :

There's no Social Security Fund or any other special fund. All the money the government collects goes into the same pool for spending. It just happens that the amount of money being collected for social security happens to be more than what is needed to pay for the program, so the balance is spent on other things.