Don't think of Brain Drain as a lose lose situation. Lot of Indians who leave India contribute in many ways and in fact bring tons of knowledge and skills from the global world back to India (even if they don't live there physically). Not to mention that amount of money that is exchanged by Non Resident Indians (also known as NRIs).

It is good that Indians are able to go aboard and bring a globalized knowledge back to India.

It’s going to be very hard to brain drain a country of 1.4 billion people. That doesn’t even take into account the massive amount of money the diaspora sends back. The above is usually an argument people make when they don’t want to let immigrants into their country.