[twoodfin]

It's not absurd: Social Security's benefits formula has significant "bend points" that make it an increasingly bad "investment" for higher income workers. Eliminating the wage cap would remove any remaining fig leaf covering its essentially redistributive nature: High income workers would have to live to 140 to get back what they "paid in" even without interest.

[mikeash]

Why do we need to keep a fig leaf to cover up what everybody already knows is there? We should either accept that Social Security is a form of welfare and rationalize it accordingly (my preference) or we should overhaul it to actually be the mandated savings scheme that it's said to be.

[bmelton]

Because welfare isn't popular, it makes it more subject to the political climate, and because as a mandated savings scheme, social security isn't terribly performant.