Well, whose money is it exactly?
An individual performed a job for which he was paid by an employer, and the government took part of it from him.
The reasoning behind the government taking money from you via SS deductions, is that there is a "kitty" being set up for you which will be available at the time of your retirement.
If the government does not carry out their duty in paying the people from whom they took money at the time of their retirement, it would be theft.
I'm not in favor of the government stealing money from people's paychecks, are you?