Society doesn't function on magic, it takes maintenance. The good thing is, by the time you reach an age where you feel compelled to give back to society and do your part, you may be about the age where you need to start drawing benefits from a society that, in turn, owes you for your time and effort.

Or, you could move to a place where you don't have to contribute and just be self-sufficient. But then no one would owe you medicine or health care so hopefully you learned some good doctoring skills before you left.

See how ridiculous this all sounds? It's easy to be a cynic and talk about being exploited, and yes it does happen to many, but it is not the pretense for existence.