"and what has that done exactly for their economy in that cesspool state?"

You mean the cesspool whose economy has been growing faster than ours since the late 70s, and that has brought more people out of abject poverty in that period than at any other time in human history? That cesspool? Sounds like their economy is being stimulated, better than ours.

"India should keep, or welcome back, their postgrads. " They try to keep them and they certainly welcome them back. They are definitely trying keep more of them studying at home, which will reduce our balance of trade whilst improving theirs, meaning their cesspool will be growing even faster than ours.