How about the bodies of the thousands dead through terrorist attacks and collateral damage? The loss in investor confidence due to the fact that we live next to an invaded country with a raging insurgency that has now spilled over into Pakistan. The loss in investor and business confidence due to the suicide bombings in the major cities, including the capital city.
The drop in the economic growth rate after 2007 and 2008, arguable the bloodiest years in Pakistan's history, is ample evidence of the costs Pakistan has borne.
It is not unreasonable to demand 'receipts', it is unreasonable to hold back reimbursements that have been accounted for already, as the article indicates, and it is not unreasonable to expect the US to fulfill its commitments in a timely fashion, as is apparently not the case here.
And you 'freakin amateur', Pakistan was not the country that stole Pakistani money paid out for products (f-16's) and then refused to return both products and money to the rightful owner. The US has a history of theft from Pakistan and usurpation of her property - there is indeed good reason to be concerned.
So spout your pretentious Yank BS somewhere else.