My friend is an adjunct. She has a PhD in anthropology and teaches at a university, where she is paid $2100 per course. While she is a professor, she is not a Professor. She is, like 67 per cent of American university faculty, a part-time employee on a contract that may or may not be renewed each semester. She receives no benefits or health care.
According to the Adjunct Project, a crowdsourced website revealing adjunct wages - data which universities have long kept under wraps - her salary is about average. If she taught five classes a year, a typical full-time faculty course load, she would make $10,500, well below the poverty line. Some adjuncts make more. I have one friend who was offered $5000 per course, but he turned it down and requested less so that his children would still qualify for food stamps.