Job supply trends towards zero. The ultimate logical conclusion of this train of thought is there is no point in keeping the lower classes alive. Why do we need 15 billion humans if they do nothing but burden you with their maintenance costs? Let them die so that the quadrillionaires can enjoy the Earth with their perfect AI workforces catering to their every need.
The future is bleak. If this is the sort of dystopia I can look forward to, then I would rather have AI simply wipe out humanity as a whole.
In Azimov's Robot series the society that chose to live with robots gradually destructed itself by just living longer and not having so many children. The other part of humanity that avoided robots flourished (not without suffering). But that all required new planets for settlement (I am looking at you Elon).
Trying not to spoil a 40+ year old story, but Asimov eventually retconned that the flourishing of humanity was driven by a benevolent AI behind the curtain.
The future is bleak. If this is the sort of dystopia I can look forward to, then I would rather have AI simply wipe out humanity as a whole.