Not just USA, services rendered to the whole western colonial block and that too pro bono, except for the trinket given these rent a sepoys in the shape of Popa John's, farm/ranch houses and little Johnny's budding career at an MNC.
Well he didn't get much for it in return. Even during the floods Pakistan had to request for UN intervention and still Western nations are looking the other way. Economically Pakistan won't get much support from the Western quarter. Being a servant of the West has no economic benefits.