Social Security is a government sponsored Ponzi scheme. If ordinary citizens had the ability to opt out of the system and the willpower to invest the same percentage of every paycheck they receive into any of a number of private investment funds, they wouldn't have any worries about retirement funds. Unfortunately, few people have that kind of self control or the ability to plan beyond where they're going to spend ALL of that next paycheck. Of course, the politicians won't allow the fools who keep voting for them to have that kind of control over their own destiny, so nothing short of an armed rebellion will ever change things! Having the ability to control where someone lives, what they eat, and the money they have to spend is essential to keeping the peons and serfs manageable.
