I'm sure that at least it is tried to answer such favours on equal terms and at the other direction.

Even in relations between the US and the EU states and NATO states, mutual espionage, e-comm monitoring and ELINT as well as economical lobbying are part of the game.
In the end, friendship only can exist between individuals. But never between "states". As Nietzsche said, the states are the coldest of all monsters.