There is nothing unusual in this. The market for highly skilled people is global and people will prefer to work in places with higher wages, better living cond

There is nothing unusual in this. The market for highly skilled people is global and people will prefer to work in places with higher wages, better living conditions and quality of life. English education and familiarity with democratic political system makes the US, Britain, Singapore, Australia and other countries relatively more attractive than other countries at the same income level.