That already exists, it’s call a 401k. We all payed into SS with the understanding we would be able to draw on it. Sure some investments would do a better job with better returns. But the majority of Americans would lose their shorts on stupid investments and become wards of the state anyway. Or are you suggesting the government tell them what to invest in? If so, how is that any different then SS?
SS isn't invested, it's a ponzi scheme.