The salary is a dynamic thing. I mean it is never fixed in a "capitalist" society (You may count China in at this time). If you are a capable person, you can always jump the ship to raise your salary. If a person is not competitive, though he/she is granted a sky-rocketing salary, it will change some time later. Read some news in recent years regarding the "resignation" of some Hai Gui(overseas returnees)?
I have a friend who had only 3000 dollars in his pocket when he landed in the U.S. About two years later he was able to command a 6 figure salary. He is not a bragger, but a go-getter, a doer. He can get thing done