Errr.....depends
Better off working as an expat? Depends. It's not just a matter of plugging numbers into a currency converter to see which pilot wins.
The national average wage corrected for taxes to give a net figure makes a good starting point for comparisons - then further refine by accounting for local variables such as housing, transport, etc. All available on the screen in front of you.
And then of course, the big and ambiguous quality of life question has to be answered. QOL issues in (say) PHX with Cactus verses QOL issues in (say) LTN with Orange.
The other man's grass is always greener until it's your turn to jump the fence and mow it. Although having said that, I must admit that there are employers for whom the phrases 'working conditions' and 'slavery' are synonymous.