Indeed we could and should have bargained for more, but a reminder is suffice that during eleven years of Zia's tenure, Pakistan's foreign debts remained less than $15 Billion, however successive democratic musical chairs managed to accumulate another $20 Billion in less than 10 years between them.
Besides political instability bringing an economic mess, bad economic management and infighting, it is I'd say a crime to neglect the sanctions on trade and discontinuation of economic and military assistance carried out under the Pressler Amendment. You've isolated all other major factors and neglected that Zia, like Musharraf, was at the helm when opportunity struck.
1991-2000: But even while Pakistan was serving a strategic Cold War purpose, concerns persisted about the country's nuclear ambitions. That gave President George H.W. Bush an easy out from the massive funding commitments in 1990, after the fall of the Soviet Union. Aid over the next decade withered to
$429 million in economic assistance and $5.2 million in military assistance, a drop-off Pakistanis still cite bitterly, accusing the United States of leaving them high and dry during the decade.
Adjusted for Inflation:- Economic : 592.47 Million USD and Military 7.18 Million USD
Per Year economic assistance :- 59.24 Million USD
As for the point of total foreign debt, as you can see in the figure below, our external debt has been on almost a linear rise ever since Independence, with some jumps and drops in the '90s owing to unexpected policy changes due to frequent political changes.
ODA (Official Development Assistance) is shown in the graph below, without adjustment to a singular value of the USD or as a percentage of GDP.
Grants at the start of the '90s are prominent but significant drop from '94 to '00 is clearly visible, thanks to sanctions and trade restrictions.
And here is an important table. Aid as percentage of Gross Capital Formation and as a percentage of goods and services is clearly extremely high during the '80s.
Adjusted for Inflation :-
Per capita aid in 1964:- 69.03 USD
Per capita aid in 1980:- 37.61 USD
Per capita aid in 1997:- 4.639 USD
Per capita aid in 2002:- 17.77 USD
Data based on Paper values above, population according to Statistics Division GOP and Inflation adjustment for USD according to US Bureaus of Statistics
Figures of course do not include backhand money exchange for the Afghan War.
The menace of the drug trade has a checkered history, it basically originates in Afghanistan, and if Colombian and Mexican Drug cartel can land on the White House lawns, then expecting Pakistan to eradicate this lucrative trade i must say is a tall order.
Moral justification anyone?