Going one step further on your proposal leads to well off people doing nothing (leisure) and earning passive income on automation, and poor people doing made up serf jobs for scraps. I'm unsure how you don't see that end result.
>It's BI proponents proposing to add a leisure class
Don't we already have a leisure class in the >1%? It may not represent a large portion of our population, but it does represent a large amount of wealth and income.
Sure, there are still elements of the leisure class that spend time maximizing their income by working/investing, but its hard to call that a "job". If there's no risk of falling through and becoming insolvent, then I'd say it's more of a hobby focused on power/wealth accumulation.
I'm proposing one class: the working class. It's BI proponents proposing to add a leisure class.