@roma, you are probably aware, we learn not only from our successes, but also from our failures. Failure is a step towards success. This is an inherent part of research. Modi comes from an environment where balancing the annual financial accounts and seeing a positive number is seen as more important. People look at the money spent on research as a total waste if the end result is not good. What people don't realize is that the money spent which is seen as "waste" is actually useful, because that money went in as investment towards capability building. It is not waste. Of course, if things drag on, someone has to pull the plug.
There are too many variables in the scenario you mentioned. Removing and/or shuffling people around, in my opinion, is not a constructive idea.
Whatever Kaveri is today, we cannot discount the immense knowledge gained by the scientists and engineers who have brought the project thus far. Kaveri today might not be useful, but who knows, tomorrow, this very engine might be perfectly fit for a new twin-engined fighter or a small transporter, and if any small tweaks are necessary, GTRE might actually pull it off.
If India really wants to have full control of its foreign policy, then its dependence on imports have to be reduced, even if our products are a little bit inferior to the western counterparts.