As it stands the Pakistani army is not capable of controlling the population within it's own boarders, forget about the ability to invade a foreign country. Now, sure, I have no doubt it could move in and kill anyone who looks at them crosswise and "Pacify" these areas, but then what happens? What happened to Myanmar when they started doing things like that? The western and Chinese "Millitary Assistance" that Pakistan so desperately needs in order to afford it's military modernization disappears. Lets recall here that there are good 50 different US companies that net more revenue than the government of Pakistan in a year. 18 billion is about as much as the US spends in 2 weeks in Iraq.
Pakistan does not have the natural resources to develop all the things it needs for a modern military indigenously, and it can't afford politically to suppress the midevil forces inside its own country. The Soviets had the space and resources not to give a **** what people thought about their policies, and in 1937, the Germans could actually suppress a great deal of the news about how brutal their regime really was. Modern news media makes that relatively speaking impossible. The Germans had trade relationships existing before the world wars, and they stayed open after them(In 1939 Germany and France were the largest trading partners in the world). Pakistan does not have any such pre-existing relationships with it's neighbors or the west.
No, economic extortion will not work to get trade, resources and cash from India, they will go elsewhere. Hell, why don't all these trade routes exist already?
The larger society does matter. Islam endorses violence for religious reasons, stopping a secular government from suppressing the populace in order to become a superpower seems like a pretty good reason to many ears. It does not sound so bad to me, and I ain't the world's most observant Muslim if ya know what I mean. ( I'm Catholic)
Yes, space is not the battle-sphere of the future, but it makes for a fun read
All that said, you will need some type of space program for satellites and kinetic energy weapons.
My final word.
Could Pakistan become a superpower? Sure, no specific reason it could never be a superpower, but it has a good 60-70 years of technology and society to cover, and there is no reason to expect that progress will happen any faster in Pakistan than for it's competitors.
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-Note, I know that there is such a thing as purchasing power parity, but even at 6-1, that is budget of about 120 billion, compared to the US military 440 billion
peacetime spending. Currently it has gone over 600 billion a year.