Most everyone will still “work”, but the nature of work will likely be radically altered in any truly post-scarcity society.

Essentially, since “income” and “wealth” will not exist in a post-scarcity society, people will gravitate to those things that need doing, but which cannot be easily automated. So there will still be people doing “menial jobs”, but only because they get gratification out of completing that job.

Of course, having a post-scarcity society also requires people to reach adulthood without any mental illnesses such as greed and avarice and sociopathies, which then allows us to revamp society into a more collaborative and socialistic structure where people are actively shamed by only taking and not giving back, which is how most any capitalist operates.

Essentially, post-scarcity societies can only exist in the complete absence of capitalism, because capitalism requires scarcity in order to function, and will always artificially generate scarcity where none exists. This is why so much food is wasted and destroyed in our current system - over 80% of food wastage is not done by consumers, but by distributors and sellers, in order to prop up prices and profit margins.

TL;DR, we need to utterly eviscerate and eliminate wetiko from our civilization if we are to ever achieve equality, equity, and post-scarcity. Greed and avarice of any kind must become the worst possible insults to apply to others in this world.