Social security is problematic because as a society we tend to abdicate to government what government is willing to take over we have been taken in by the immoral notion that the government is going to take care of all the old people so we don't have to worry about it as a society... social fabric doesn't matter anymore.
Social security is a massive Ponzi scheme in which early participants are paid off with money put up by later ones.
Social security is a Ponzi scheme, but a workable one in that the perpetual succession of human generations establishes the conditions for its sustainable.
Social security is essentially the idea that instead of supporting one's own parents out of love and duty (such that family bonds are strengthened), one instead supports someone else's parents out of compulsion and fear (thus weakening family bonds).
Social security is problematic because older people did not have an incentive to save so the savings rate actually went down after Social Security because you may as well spend your money somebody else gonna pay for you and you're old.
Social security is a ponzi scheme which works only if tomorrow's young are numerous enough to be able to keep on paying for tomorrows old people as today's youth are who are paying for today's old.
Social security is anti-freedom because it is not the business of government to tell people what fraction of their incomes they should devote to providing for their own or someone else's old age.
Social security is problematic because where formerly people would have to invest in children to take care of them when they are old, now the they could trust that the government would take care of them.