The title of the thread is - Is Letting Pakistan Collapse An Option?
India has no role to play to foist or let Pakistan collapse. Any action by India would not be taken as anything but with suspicion and if anything goes wrong, India would be the cat's paw.
Nobody can help Pakistan since it has become a real complicated issue where all pillars of power in Pakistan are pulling in different direction to suit their own agenda. And such forces are powerful in their own rights.
The Clergy has taken grip of the situation in Pakistan and within itself, there are warring factions clawing for power, apart from quasi charitable organisations, which are but fronts for the face of terror.
The Democratic system is but a cosmetic face of Pakistan, desperate to give a façade to the world that democracy functions, when in actual fact, it is but a toothless paper tiger.
The Army is all powerful and wedded to the fundamentalist thought, ever since Zia's time. Hence, while projecting a false front to the US (to obtain military toys that prop their existence) and at the same time help the fundamentalists so that they can project to the Pakistani public that they are wedded to the religion as and when the Taliban takes over Afghanistan with the ISI's help in all its facets.
In this total confusion and power play, there is also the growth of subnationalism as is being witnessed in Balochistan, Sindh, Balwaristan and by the day it is getting more festering. To this also is the aspirations of the Mohajirs represented by the MQM.
Therefore, given all these tussles, one can hardly be in a position to assist since all these forces cannot be brought on one platform.
Collapse is inevitable in the long run.
The only thing that has to be taken into consideration is that the fallout on neighbouring countries is contained and they are not affected by the outcome.
It is also true that the situation appear ready for collapse, but that actual collapse is apparently still some distance in time away.