US carriers do NOT pay $24,000 per month simply just like that. You don't make that on getting hired. Not even half (much, much less in fact).
You'll have to put in hard graft for 20 odd years and have some luck on your side to make that sort of cash with US airlines. Will go out on a whim and say that only a small percentage of folks earn anywhere near that.
These other gigs (china/asia) pay the cash straight off the bat. So it's not really a fair comparison.
APC has all the figures on the pay. To earn $24,000 you'll have to put in about 20 years to get close to that. Not knocking it - just saying it how it is. US airlines and pay just don't stack up. But then a lot of other things they have do (eg benefits, union etc).