Rebdoniel: being a “productive member of society” means something different to everyone. if you understand it to mean going out to work as a dr, lawyer, accountant, businessman etc and getting a paycheck, thats jolly well good. but this world is a give and take world and not everyone can give in the same way and not everyone can take in the same way.
this may be how you are a productive member of society.
but you need to understand that other people see it to mean joining the army and fighting for their country and what they believe in.
and yet others understand it to mean sitting for hours learning Torah.
every person who believes being productive to mean one of the above understands what he is doing to be supportive to the world in some way. and you cannot deny that any one of the above three are not important to the sustainment of the world.
and if you do deny the third to be true, then I cannot help you my friend.