Still, finance ministry is right. We should go for economic development and not for spending too heavily on roads in areas where investment can't be recovered. I agree, more roads in the borders will help us raise the threshold for nuclear deterrence, so that minor misadventures from Chinese side can be extinghuished on the border itself. After all we never wants things to go nuclear.
Though, my belief is that eventually China (if sense prevails) wants to use those roads to sell it's goods to us, via a land route.
They can't justify those roads trying to sell to Bhutan or Nepal.
We should be open to that at a later time. Trade with Bangladesh, Myanmar and China is good for development of North-East.