Everybody understands that the eligibility ages for Social Security and Medicare cannot coexist with contemporary actuarial tables on the recipient end and the extended adolescence and pre-adulthood on the paying-in end. But rewriting the rules in such a way as to recognize that pilots and firefighters and miners and continuous caster operators and police officers might be worn out long before keyboard jockeys are will take a lot of work, and a lot of people will be relying on their private savings until the legislators and the plan administrators get it worked out.
That's the easier problem. The harder problem is disentangling the effects of the military and commercial victory in World War II, which gave Big Industry and its Big Unions temporary monopoly rents, from the policy effects of subsidized university education and housing and the rest. It's probably not enough to ask whether a Soviet G.I. Bill would have offset the effects of Stalin, Khrushchev, and Brezhnev on the lot of the toilers.