Ok - if you subscribe to the "happy degrowth" theory, that changes everything. But that has nothing to do with fiat money or gold standards; on the contrary, I would argue that fiat (ie, government controlled) money would make it much easier to make a transition to that new way of life.

But the transition to a happy degrowth FOR SURE can't happen with simple market mechanisms. At least you need to limit the working hours. At worst you need a completely controlled economy. Technological innovation + free market + degrowth = massive and unsustainable unemployment, that's for sure.