But hasn't there also been a shift in what is needed to get and hold a job? What about those that for whatever reason can't be trained or educated towards the new jobs that pop up after the jobs for the moderately or unskilled workers have been automated away, the not-so smart? They don't disappear along with the unskilled jobs.
Every problem solved creates a series of other problems.
Don't these other problems become more and more complex, so that fewer and fewer people can solve them?