I completely agree that an economically sound Pakistan will be in India's interest , They need to come out of their current obsessions and rather concentrate heavily on economic growth , for that they need more investment not just from china but from all across the globe. ...
For Investment from international community they need to ensure peace prevails in their country and for that they need to exterminatate all kind of good and bad "terrorists" from their soil. Just by raising taxes and claiming to bring back money from swiss bank will not help Pak.
Once Pak will align its economy with international economies , it will not be the same Pakistan as it is today , indirectly helping India to have a peaceful and rapid growth without threats of war .