The fact we can even attempt to compare Social Security with Bernie Madoff's ponzi scheme speaks volumes. I've long considered my Social Security contributions as an expensive tax, money I'll never see again. I can state with full confidence that if I'd been given all that money as vouchers meant for tax-deferred accounts my personal retirement portfolio would be far more impressive than it already is.
But no, can't have that. We can't trust you with the money you made! If we just give you that money back who knows what you'll spend it on?