What were the wages 10 years ago when regionals were hiring with a minimum of 2000 hours. Not very high. We haven't seen wages go down since then just the size of the planes increase. Supply and Demand theory doesn't account for outside variable. Everything must maintain constant for that theory to work "Ceteris Paribus". It doesn't work nothing is constant in aviation.
Aviation isn't the only industry that is suffering due to corporate greed and young eager college graduates willing to work for less. Something that would help this industry directly would be for a couple low cost airlines such as Virgin and a Major to take a nosedive, Chapter 7. That would allow the rest to raise their prices giving the unions better bargaining power