Teaching and academia are two different things. "Academia" implies a research position, with a minor (if any) teaching component. Those are extraordinarily hard to get and attract some of the best talent in science. The money is pretty decent, many start around $100k, and you can get up into the $250k+ range if you're awesome. Positions that focus on teaching are not considered desirable at all, and are kind of looked down on by the research crowd. The pay is much lower, $60-70k max. You might get to do just a little bit of research in your spare time, but you won't really have a lab to speak of. Aha, you were referring teaching job, ok.