India is severely capital-deficit country, so movement to capital surplus countries with pricepoint labour (and price point intellectual capacity on other end of pyramid) is inevitable....then surpluses are remitted given labour is just one part of family unit and family unit is just one part of family network etc. This used to show up more in difference between GNP (total citizens production, wherever they are located) and GDP (production inside a country, whatever the citizens/non-citizens inside it), till the former fell out of favour.
As India builds up its capital, this will change. % wise the trends are already showing w.r.t retention, building of market cap, FDI stock, total capital stock, number of corporations, IP transfer etc.