In the past there was a big overhead in managing all of that. But I could think that this is coming to an end.

Solutions could be: Make weekend longer / Work less hours a day / implement minimum income (regardless if you work or not).

A more realistic scenario would be: Scale up productivity. All work is done by AI and robots? Just create even more wealth with more people working on and with robots and AI.

AI is bad at creating things that have not been there. It is good at structuring data in a new way. So there is still a demand to create new things.