India is now able to retain its best students. There are 2 special universities which develop Space Scientists- IISc and IIST. What you see is the product of some of the best minds. About 250 students are trained right from the under-graduate level, every year.
That is totally incorrect, and I am being polite.
An overwhelming proportion of ISRO/DRDO scientists are graduates from Engineering & Science colleges from South India - especially Tamil Nadu. Very few IISc/IIT grads - overwhelming number of those still prefer to take a flight out. And we cant blame them.
I agree- A large percentage of IIT graduates do not even want to remain in India. The route is IIT->Head to US->Settle in US, or, IIT->IIM->Head to US->Settle in US.
Add to that the traditional herd mentality- we have got Civil, Mechanical and Electrical engineers practically hunting for work in the IT Sector. Every Tom, Dick, and Harry wants to have a 'Start- up' today.
ISRO students are increasingly coming from second tier government institutions and even some private ones. Also, be it known that in India, unlike most other countries, the government inst. are way better than the private ones in quality of teaching, quality of faculty, infrastructure, and research.
Look, I have conducted scientific research (cell phone networks) many years ago, and my experience is 'Don't go for research If you are looking for money an/or fame or quick results'- this is as much as true in the US as much in India.
Only those with true passion can do good research. Those with even greater passion, or financial limitations, will stay behind in India to do it.
A guy out of IIT has much more choice- he can get MUCH better pay, so the money- minded ones seek to leave quickly.
IQ 6969- If I wasn't addicted to Frog Porn, I would be perfect.