I think something Keynes got wrong there and much AI job discussion ignores is people like working, subject to the job being fun. Look at the richest people with no need to work - Musk, Buffett etc. Still working away, often well past retirement age with no need for the money. Keynes himself, wealth and probably with tenure working away on his theories. In the UK you can quite easily do nothing by going on disability allowance and doing nothing and many do but they are not happy.

There can be a certain snobbishness with academics where they are like of course I enjoy working away on my theories of employment but the unwashed masses do crap jobs where they'd rather sit on their arses watching reality TV. But it isn't really like that. Usually.