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.