EU nations spy on the US. That's not up for debate. It is a fact.
That's how the world works.
http://www.nytimes.com/1993/04/30/world/us-expanding-its-eff...
That's how the world works.
http://www.nytimes.com/1993/04/30/world/us-expanding-its-eff...
This is a trust/image issue for the states, and it's really taking a beating right now.
AKA individual member nation governments.
I digress. I think ultimately you have to decide to accept current practises as inevitable, or malleable.
I for one, do not think allies should spy on each other. Being caught so would have punitive repercussions such as increases in trade rates. If perpetrator makes a big deal about it, then find better allies, and then they can spy all they want.