Well, to be fair a QF 380 SO earns more than a QF 737 FO……
There is a stark difference between geting paid 'X' salary and actually earning it. That seems to be lost on some on this forum.
Feeding the chooks in crewrest on a 15 hour sector and not sitting in a control seat below FL200 vs doing 4 domestic sectors with 3 aircraft swaps is the difference between getting paid and earning.