There are environments where people earning $20,000 are still treated with respect and there are environments where people earning $200,000 are treated badly.
Every job I've had, people have been polite and friendly to me. No bullying or harassment or anything like that.
But the low-paid jobs would carefully police our working hours and sick leave, while taking a toll on our bodies and demanding measurable daily performance. Whereas the highly-paid jobs would trust me to work my contract hours, take my word if I said I was sick, didn't expect me to lift anything heavier than a laptop, and barely audited how hard I was working at all.
If you think it's prima facie disrespectful to require a doctor's note for sick leave, my poorly paid jobs have been less respectful than my highly paid jobs.
The guy on the door at the HQ building?
I'm sure that you can argue oh, those people are actually working for a contractor, but let's agree for a moment that this is purely a matter of paperwork, those are Oracle cleaners, that guy is on the door of Oracle's HQ building.
Is Costco a worse company than Oracle, because the former has employees making $30,000 and the latter doesn't?