Wow...you can't be serious thugs like Nawaz and Zardari could manipulate the Army and the ISI...look at the history of Pakistan...these army and ISI guys are there to serve till their pensions...while the volatile politicians come and go on daily basis...lol
You are right that these crooks and thugs come and go. Problem is that these people (especially in Pakistan) have little loyalty to anything but themselves and money. These days, they also bent to damage the country for personal revenge (they were stopped from looting and plundering for 8 years), without even realising that the damage could be permanent.
Once in power, they are capable of doing irreparable damage to the country and when backed by western powers having marked influence amongst Muslim countries who have control over mental state of many retards in Pakistan (due to sectarian affiliation), Media propaganda machine working day and night churning misinformation for vested interests, selected crooks and thieves from past government services providing their service for payment, Interest of Eastern neighbour using all resources to help them, and so on ... plus propaganda that started few years ago has created many who can defend Pakistan on their back foot, then task is not too difficult even if not very easy.