I prefer you clarify since you posted the original question.
As for SS, as long as people have the CHOICE to opt out, it can stay. The thing is those that opt out, and they are the ones that fund the distributions today, wouldn't have to contribute to it anymore.
My contention and the reason I said what I said about SS is that a person contributing at an income 4x higher than another person with all else being equal, does not get in distributions 4x that of the other person. I ran a few numbers on the SS website calculator. It was an estimate but proved my point. I put in the same birth date and "retirement" date for two scenarios. The only difference was the income amount. I used $25k and $100k, one being 4x the other. The results didn't produce a 4x greater distribution. It was about 250% higher ($1125 range vs. $2500 range)
Why shouldn't someone putting in at a rate 4x higher get 4x/month when both start getting out?