Until India can get its economy back to 8%+ growth levels and a nominal GDP close to Japan's ..no matter what its population is...UNSC permanent seat is a bit out of reach (IMHO)
Power hierarchies are : US, China, Russia, GB, France in this order.
Comparisons to China...and when India might overtake it are futile in the present!
Until there is a sudden turnabout in China's India related policy (which I personally think has infinitesimal probability), it will always Veto this proposal.
But frankly...the only use of a being a UNSC PM is to bully around smaller countries.
All the 5 have gone ahead with military intervention wherever they have seen it fit since they have had the military power to do it.
Such resolutions were never tabled at the UNSC...since they would be vetoed anyways.
Its because of the Veto powers...the non-permanent members have zilch roles to play!
Also..this had to happen,
Sit on the U.N. Security Council? | The Weekly Standard
One a side note, India's diplomacy related staff is woefully inadequate.
IFS is actually not that popular anymore.(2 of my friends who made it ...got IAS...they were so happy it wasn't IFS
)
I hate to quote TOI... but this article does give numbers and makes sense
Foreign policy on a shoestring - Times Of India