Where, in the space between our teenage years / postsecondary education and our senior citizen years, have we paid back society for raising us, supporting us in our productive years and then caring for us in our unproductive elderly years?

In other words, should the government which provides you infrastructure and self/private property protection require you to be economically feasible in your peak years?  Or else?

If a citizen isn’t viable or useful to government, then can government refuse service to the citizen unless another citizen (or citizens) step(s) forward to make up the difference?