I think AI outcomes distribute to contexts where it is used, and produce a change in how we work, what work we take on. Competition takes care of taking those surpluses and investing them in new structure, which becomes load bearing and we can't do without it anymore.
In the end it looks like we are treading water, just like it was when computers got 1M times faster in a couple of decades, but we felt very little improvement in earnings or reduction in work.
Surplus becomes structure and the changed structure is something you can't function without. Like the cell and mitochondrion, after they merged they can't be apart, can't pay their costs individually anymore. Surplus is absorbed into the baseline cost.