If there is one thing that the Founding Fathers got wrong, it is this: Supreme Court appointments should not be lifetime. Immune to politics, sure - Once they're in, they cannot be removed for term, maybe, but I believe that they should be fixed-term, not forever

What I would propose is thus: Each president should be allowed one appointment, 40 year fixed terms. Same confirmation rules, but rather than the vagaries of when justices step down or die, we have a floating pool of 7-10 justices at any time with new ones being added at a fixed rate.