If graduates of IIT / IIM / Ivy League MBA / MBB joined ISRO , then …

They will probably not do anything special or different. I'm sure ISRO's intake process is good enough to filter out the chaff.

Probably increase dinner budget of ISRO

Media and booomers will circlejerk using iit, iim, isro tag.

They will create mobile app for streaming launch and podcast

They will be bogged down and move out soon after seeing all the red tape around

They will go to black hole and disappear.

C'mon, it's not like someone joins and it happens something ecstatic.

Even nasa took decades to reach where it is

But for sure best brains can get us out of our galaxy if funding is assured

Funny responses only

The older institutes were established to heed to growing need of homegrown technocrats and managers in the public sector.
It's sad that way too much sheen is taken by IB, consults, and startups over time but those who really want to, would surely relish an opportunity.