What about a meritocracy based system where any type of contribution is rewarded, whether it be research, garbage cleanup, etc.? (I’m sure there’s holes to poke in it, just thinking outside of the box.)
The problem with that and most other proposals for whatever other moneyless utopian society is that they all implicitly require some manner of all-powerful central authority to ensure that the rewards get distributed, the labor gets allocated, and the rules stay followed.
And we already know how well that's going to turn out.