Having their children study abroad, has always been a dream come true for many educated parents. It also gives them a great sense of pride when they come back with aspirations and dreams to take on what has been waiting for them for a long time.
Of course there is another group that does'nt plan on coming back, either due to their rising fortunes and need in the foreign countries open to migration.
Succesful candidates who have opted to come back are driven into the mainstream corporate india, which(corporate india(services)) is into various activities like increasing the standard of living of millions of indians, education sector, sales and marketing etc.
Being educated from foreign universities gives them a vision that is usually not attainable in traditional family driven enterprises that forms the base of indian economy(agriculture, manufacturing,education, banking etc).
The purpose of foreign degrees, as far as I have seen to not to compete directly with Indian based degrees, in terms of their target market.