How do professors make their money?
At larger research universities, teaching is often the responsibility of graduate students or adjunct faculty. Regardless of the type of institution, teaching is the primary way that professors make money. Most professors earn a salary for their teaching duties.
Where do academics get paid the most?
If a professor can obtain a position at a prestigious private university, he or she will most likely be paid a lot more than at a second-tier or lesser-known public school. As you might expect, the highest-paid professors teach mostly at prestigious private universities: Columbia, Cornell, Yale, Harvard, and Duke.
Can you make money from academia?
Again, only a relatively small number of academics earn any serious money doing this, but a few manage to make big money. Beyond these items, academics can of course apply for second jobs just like anyone else, but this is rare, since academic work tends to bleed into weekends and holidays already.