Given how people function in today, I seriously don't see this working. What would the incentive for being, say, a medical doctor be if there was no benefit and all work. Currency definitely has it's ups and downs but humans ultimately need some kind of reward for actions and currency appeals to pretty much everywhere. Sure, some people can be saints and help other people because they can but this way everyone wants to do something. I know about poverty and all that but I don't see society functioning without currency sadly.