expat life in the world

according to an article in the gulf -times expats earn the best worlwide in japan , russia and qatar

though prices are the lowest in india ,malaysia and china - but in the three above countries one third of the expats earn more than $200.000 per year ...

i made a little calculation - it means 60 - 70 thousand rial per month ...
who are making this big money ?
one third of the population here?????