The most important arguments for Social Security privatization are moral, not economic. Privatization would not be justifiable if it were economically beneficial but morally suspect.
However, a privatized Social Security system meets moral criteria far better than does our current, bankrupt, pay-as-you-go system. A privatized Social Security system gives individuals more freedom to run their lives, is fairer, provides more security, and creates less antagonism between generations, fostering a greater sense of community.