What about those that can't perform past age 60 yet have such low skills they don't save because their lack of skills meant they got a lower wage? I'm sure you'll have some redistribution minded solution where those that did pay for those that didn't.
No, that is exactly WHY we have Social Security, dude.
IT is better to let these people have some cash rather than let them fall into a pit of misery and despair, spreading disease, causing accidents and dying in their own shit at home and thousands of tax dollars being spent to go to their homes to treat them or get their bodies for disposal.
Besides all that, what about simple compassion for stupid people? We have to have that for some very solid reasons as the consequences of having a high percentage of poor is more costly than just giving them money.