As someone said above, as long as textile exports keep going and remittances keep coming in, Pakistan will survive though it will be painful for most Pakistanis. But the feeling of pain is relative in populations of different countries: People here are talking about Argentina: That country was perhaps the most prosperous country in Latin America decades ago and not too bad until even in recent history. Countries like Argentina or Greece, when they faced the hardships, they really felt it because large part of their population was living high on borrowed money. Pakistanis, on the other hand, have been living pretty modest life and so, in comparison, are not going to feel as much pain. Also Pakistan has 220+ million people--most of them are young. The problems of drugs and alcohol as well as broken families is not too common. They are the human resources which can be used to support the already existing large undocumented domestic economy. North Korea survives without hardly any domestic economy--I know that's an extreme example but why can't Pakistan given its human and natural resources?? A 'Juche' ideology won't hurt Pakistan if it comes to that.
So... A stable govt, , external debt rescheduling, peace inside and on the borders, and perhaps some 'New Deal' like programs--they would be the foundation to build back. Pakistan is hit very hard: Pandemic, Russia-Ukraine War, Floods of 2022 and the political anarchy since April 2022; some of those factors affect most countries of the world. Even 'corruption' is not Pakistan's worst problem. The same political class--the military, the beauracracy, the politicians were ruling Pakistan for the first 40 years of Pakistan's life but Pakistan was still better than India in many ways--even the Pakistan hater Shehkar Gupta admits that. Anyway, of all the factors hurting Pakistan right now, what can be more easily controlled is to introduce the political stability in the country which had largely existed since the 2002 elections and lasted till April 2022.