University prof might not be a wealthy job, but class wise it is usually considered pretty high class. We're not exactly talking about the people putting 9-5 in doing manual labour at a construction site.
> A college degree in things like literature, political science, economics, and general science subjects (physics, chemistry, math, biology etc) tend to be inexpensive here, as compared to a degree in engineering or medical science.
Maybe, but its still a large investment for questionable financial gain. The opportunity cost is high. The pay-off (ignoring things like love of the subject and instrinsic value) is pretty low. Its a hard thing to justify if you're not at least upper-middle class.