sir,
To be honest my knowledge about "union between the US and IRP " may be slightly more than u've assumed.
In my humble opinion i would say ruling elite of pakistan had never been very vocal about their cordial relations with US...although there were few hiccups like Presller Amendments ...as fate would have none of it ... and as the history shows US and pakistan often brought closer towards each other from time to time based on the events that unfolded themselves over the period time at that part of the world.
At the same,what i meant say is, though pakistan ruling elite got adequte benifit from their lasting relations with the USA...they hardly ever seriously combated the anti US feeling espoused by certain section of pakistani society . Its seemingly hypocritical that one hand pakistan has been receiving regular assiantance from the USA,on the other hand when people "shout death to america",there has not been much endeavour, in fact a failure on part of ruling elite of pakistan to come out vocally aganist such negative opinions and showcase positive aspect of huge contributions made by USA historically, be it military or economic , towards the betterment and strengthening of the the state of pakistan .
Let me give u the example of the Drone attacks...though such attacks come only after covert understandings and approvals of both Pakistan army and GOP...but on the outside, GOP approch has been very evasive and noncommittal on either in clarifying its actual position or making it clear such attacks are incat in pakistans best interests as it eliminates taliban terrorist that hiding inside its territories...it just lets USA alone to take all the heat and the resentments it causes because of such attacks for which pakistan is equally responsible.