Just divide the economy into people with even and odd numbers of letters in their name and pretend they're part of different countries trading with each other.
Mandatory anything is a bad start.
I really find it amazing that people could subscribed to the idea that there is a finite amount of work to do, and the worst thing that cuold happen is that it runs out.
What a googley way throw an insult! I find it disappointing that you think there is an non-finite amount of work that can needlessly cause people to toil.