We don't even need to bring aliens into this scenario - as this is the direction we are already heading towards with fully automated manufacturing and AI replacing vast sectors of human labour...

(And yeah, I get it - no one "really" wants to work on a "soul-crushing" assembly/production-line... People want to make art (or games) or write novels... (both areas of creative work which are ALSO being targeted by AI)... but people definitely want to "eat" and have shelter and our whole system is built on having to pay for those priviledges...)

Or people do other things.

Around 1800, 95% of people worked on the farm. Today it is 2%. People do different things now.