To play devil's advocate: Why exactly would you expect to get paid more just because there was a big investment in more expensive tools? You're not working any harder, the machine is. Getting paid more is always nice of course.
Any pay rises have been more of a side effect in the past of complexity and therefore needing more skilled labor to say operate a bulldozer or backhoe than it does for any individual with a shovel. Productivity may boost the economic ceiling of 'how much they can pay before they literally start losing money' but more assembly lines didn't mean big pay raises. A backhoe didn't mean that ditch diggers suddenly got paid 50 to 100 times what they were previously from other's expenditures because they could dig that much more. And that is before the back-and-forth of induced demand and supply vs demand causing the price of the labor to drop with more efficiency.
AI's whole thing is to provide for easier operation and trying to deskill the operations. (Key word: trying, currently knowing what the hell you are doing is essential for filtering good outputs from bad).
A social system that looks at a technology like LLMs and decides to use it to increase "output" in some abstract way while reducing the median standard of living is a system that will have a hard time maintaining popular (non-elite) legitimacy. That doesn't mean it will evaporate over night -- plenty of ghastly social systems have survived centuries with very little non-elite legitimacy.
It remains to be seen if LLMs will be used in this way, but the messaging so far (including your post, the one I'm replying to) suggests that the elites' inclination is exactly that: more profit, more control, more power now for elites, temporary (possibly years, maybe as long a generation or three) but real suffering for many of the rest, and a steady state at the end of the transition where they are still in charge, much richer, and maybe also everyone else is better off (if they can't capture the gains completely for themselves).
We expect that because the company is only allowed to exist at the will of society at large.