Thats a very simplistic view and you seem very sure of it. (Plus in the there are a lot more crappy McJob's, so your point about the remianing jobs being highly paid doesn't really seem true).
We haven't seen flying cars, and there is no expectation for them in the future despite what we all expected years ago.
Have read of David Graeber's "The Utopia of Rules". As he correctly points out there is a hell of a lot more beurecracy and form filling for almost everything these days. That's a large part of where the extra work comes from.
https://en.wikipedia.org/wiki/The_Utopia_of_Rules
