Australia's highest earning occupations have been listed by the ATO with no mention of pilot there.
Australian Tax Office names Delungra as country's lowest-earning area, Sydney eastern suburbs identified as highest - ABC News (Australian Broadcasting Corporation). Scroll to page 4 in the link.
Perhaps the low incomes of G/A pilots drag the whole group down, possibly a seperate category of Airline Pilots would have made the list as an A320/B737 Captain would make the bottom half around the mining engineer level.