What happens to economics in a futuristic world?

[Good Habit]

we would have to turn the entire means of production in the economy under the democratic control of the people.

So this would then finally be (democratic) communism. It's either that, or the extermination of the human race
(as people are economically obsolete, a rational AI leadership would consider future humans just a waste of resources - may be a small number in a zoo - but else..)