6. It is a job. I have a son working at one of those outlets...
The pay isn't great, but he makes a living and contributes to society. (He stopped working at small, locally owned stores because he can't get a raise in a mom an pop locally owned place. Their margins are too low.) He has received a raise from his employer, and has health insurance.
I have friends who work in construction, who get paid quite well.
These citizens will not get rich, ever, but few ever do because the notion that anyone can get rich with hard work and frugal habits is as mythical as Zeus.
As to feudalism?
(1) They do not exchange his ownership of land for service or labor.
(2) They are not serfs that belong to the land and can not leave.
Adam Smith an Marx used slightly different working definitions of Feudalism, but both hinged on a form of power based on ownership of land and agriculture. It became obsolete with Capitalism, a version of which we follow here in San Diego.