Once there are enough vacant jobs that pay above the living wage around $20 an hour in the US. For the low paid to fill. BF is spot on.
https://en.wikipedia.org/wiki/Living_wage
Here in the real world Jobs, that pay $38,000 a year, are going East at a rate a lot faster than they're being created. Add to that automation and the odds of people with a poor State education getting up the ladder is so low most don't bother.
This is increasing at a rate that needs to be stopped. The only winners are the top 5%. And most of them don't win a lot, the top 1% do and that's why they buy politicians.