In reality AOPA should be lobbying CASA to change the entry requirements to airlines. The reason people are getting jobs overseas is because they CAN!!! They don't have insanely highly MINIMUM requirements. People in Europe are walking out of flying schools straight into Jets. While I think that is probably not the safest option, there has to be a happy medium between that and what we have here which is quite frankly insane. People all round the world can safely fly big aircraft without 500 hours on a busted arse piston twin.
Similarly insurance companies need to come to party as well as they are part of the problem especially for GA operations. You might also want to ask the RFDS why they have a multi requirement when they operate single engine aircraft??
The other consideration is the amount of money that is invested in aviation
License cost say 60K + Larger Twin Endo 2.5K + Turboprop 10K + Jet 35K
There's 107 000 dollars and 8 - 10 years of your life just to get into Jetstar. Not to mention all the associated stuffing around and pressure on your personal life etc. Until you get into a Major airline you probably won't see a salary over $55 000 if you are lucky.