Comment by arjie

Yeah, because all those employees are now doing much better paying jobs elsewhere instead of a low paying job like cleaning a dining room. The dining room at a McDonald's functions just as well at the 80% dirtiness as it did at 10% dirtiness. It's like how you can go to India and there'll be like 400 different employees at a hotel. One will usher you into the door. The other will hold the door. The third will say "Welcome, sir!" and lead you to the front desk while a fourth tells a fifth to grab a suitcase.

That's what the end of the middle-class means: everyone is getting too wealthy to employ in near-menial jobs.