Going Boeing,
Urban myth, just get contracts off AIPA site and do the maths.
I've been on 744,737 and now A330, with 151 and minimal O/T the 744 is going to be above 737 [without mentioning the workload!]
You are right though that it is generally less and hopefully can be increased due to the lack of qualified drivers happening worldwide!
The point is that some people think V oz's "rumoured" pay is good[it is not]!
Australia is a great place and I well understand why many would accept lower pay to live here [myself included] but it is still a sub standard deal, Jetstar even worse.[My mates O/S would love to come back but asked if the numbers were "monthly, fortnightly or weekly!?]
The way the $US dollar is going this may start looking better of course!