A system designed to artificially limit supply impoverishes the world and most of the profit inevitably sticks with the middle men whose existence is only necessitated by the artificial scarcity.

I specifically stated the sustenance level basic income plus patronage as I expect people must have enough to survive but ought to be incentivized to earn enough to live better.

I've heard others, not you, express the nonsensical idea that if people had enough to barely survive they would all quite providing value to society until the whole pyramid balanced precariously on the backs of the few remaining working people collapsed. This is a basic mis-analysis of human nature. People would strive to produce both for reasons of self worth and desire for a better than basic life.

I expect many to most writers with no readers and no earnings would eventually tire of the affair and move on to others.

Others would find a way to live a better than subsidence level life via patronage or doing other work to finance their hobby.

Do you really believe in a world without copyright that Stephen king wouldn't find any supporters?