How about replace money with nothing, a system where people just do what has to be done because it has to be done or they want to do it, combined with small incentives and some mandatory tasks.
Farmers plant crops because people need food, doctors heal people because its what they want to do, some people are fire fighters because there are incentives, and some people collect and recycle garbage because they got unlucky and where assigned 4 hours waste management this month on the mandatory chores lottery.
As for dream or nightmare, it would be a dream. but the transition would be a nightmare. there is no way the owners of big corporations would give up their money and its power without a fight.
Money will be our downfall. Sure, my scenario is unrealistic and would never work, but the only reason it would not work is because we are talking about us humans doing it. roll on the greed, roll on the nuclear war, lets get it over and done with. may the ants and cockroaches do a better job of ruling the world.