Could they have better tax breaks????
I know from a previous life forgien companies working in Australia were only subject to their home countries tax, in certain mining area. I think at the time it was a break to encourage the industry that was in a slump. Worked, its going off now.
Could it be possible they aren't subject to all Aussie taxes?
Also, even if wages are same per person, likely they will have less people at the top end. Look in Melb now, there at not hundreds of people to get this off the ground, no Alan J* pay packets down there. There is only a handful. Jet* started with queit a number of highend ultrahigh salaries.