Earlier quoted context omitted.
Pilots aren't in short supply. Pilots willing to accrue $40k in dept for the necessary education to then get paid $25k a year are very much in short supply. Many regional pilots are on food stamps. This is the reason I currently write software instead of flying commercial airplanes.
Shouldn't wages increase with demand? Why aren't they?
It's a similar situation to National Park Rangers: there are so many people willing to do the job that wages are very low.