Many saw this age of human unemployment coming ages ago. Technology is going to replace most humans from work. Money will be scarce to too many and become useless to production.
https://en.wikipedia.org/wiki/Renaissance
After the black plague, Europeans found themselves richer. Some inherited land, food and necessities became less expensive.
“Some Marxist historians prefer to describe the Renaissance in material terms, holding the view that the changes in art, literature, and philosophy were part of a general economic trend from feudalism towards capitalism, resulting in a bourgeois class with leisure time to devote to the arts.”