All it would actually take to avert a jobs crisis is for the per-token price of LLM generation to increase to the point where humans are competitive in dollar terms for intellectual work.

This could happen all by itself if the major LLM players coordinated (i.e., formed a cartel), or if they were forced to to recoup investments (we all know this is coming to some degree, at least for the western companies). Alternatively it could be forced into place if ~all major nations' governments start taxing AI use (which seems eminently a good idea to me in any case).

There's still the issue of local LLMs, but this could be addressed with taxes on GPU hardware, etc.