It is already being done lol.
every month you hear about Oli vs Prachanda fights, it is only being taped over by copious amounts of Chinese money, but that is very short lasting.
Btw we are interfering, but it is reactive to Oli growing wings, flying, hooting in Chinese, and shitting on our interests.
There doesn't seem to be an active policy so to speak of "managing" the internal affairs and politics of our neighbors to be conducive to our interests as of yet it seems, only reactive fire fighting efforts.