Just watch GA conditions fall if there is a surplus of pilots. It's much easier for a large group of pilots in one company to negotiate, than it is for small groups of pilots in many companies.
Back in 1999 first year Metro F/O award was $27 158, Captain pulled in around $50 000. Baggage handlers in the airlines and refuellers were nearer to $70 000.
Current GA conditions are simply supply and demand which could change, where as airlines have always had "good" pay after a few years in.