Yes, Absolutely. I mean that is why we use to say .."When u learn here, graduated here, then why u go to other country and serve their nations ECONOMY". I means that is only for saying but below are some points:-
*) Foreign Cash in- flow,
*) Provide Backbone,
*) Higher standard of living,
*) Increase the GDP(GROSS DOMESTIC PRODUCT) of a country,
*) Knowledge gain in some place but implementing in other place, hence, Quality increase,
& MANY MORE........