Chaps,
Under the Industrial Laws in place in Australia, the only way to increase your wages is through collective bargaining at the workplace.
Award rates cannot be increased except through the annual wage review performed by Fair Work Australia so your only option is to go to your employer.
This is where it gets tricky.
Whilst your employer is required to bargain in good faith (as are you) and you have the "right" to take industrial action (provided the relevant hoops have been jumped through) you have the problem that you are a "essential industry" and "vital to the nations economy".
This means that any attempt to take industrial action concurrently with employees negotiating with another employer would be doomed to failure. The employers would only have to show the potential damage to the economy which would result from such action and it's all over red rover.
So improving your lot when employed for QANTAS/Jetstar, Virgin or REX may be possible during collective agreement negotiations because of the sheer number of pilots employed in those companies. You face the difficulty of ensuring unity though.
In the smaller GA outfits however, I can't see any way to improve the wage rates because these guys fly under the industrial radar and there is long history of pilots being dismissed for "misconduct" when questioning their pay, let alone trying to negotiate a raise.