As far as I was aware there is a federal pilots award which covers all general aviation pilots in Australia. Obviously I may be wrong as I still know of operators that do not pay what I took to be a compulsory award wage. It can be found here:
Find an award | Fair Work Australia . This is slightly different from the AFAP one where only members are covered.
I am happy to be pointed in the direction as to where it says it doesn't cover all general aviation operators in Australia as I have only glanced over it. It took me a while to track it down when I had a problem with pay rates a while ago. Hope this is of some help.