And this is exactly why more and more non-US-citizen don't like the US anymore. Seeing the world in two classes "US" and "non-US". Yes, I know, no secret service is better. The question is: Are secret services compatible with democracy? More and more indicators let me think: no.
Except the situation we are in, the US spying on both Americans and non-Americans, seems to suggest that they are not at all seeing the world "in two classes" as you claim.
Nobody lives in a true democracy. And it's actually a good thing. Unfortunately the majority of the population is willingly ignorant and refuses to be educated on complex issues. Instead, they have very unbalanced opinions, based almost solely on emotion. It is very easy to harness those emotions and use them to raise to power and then do unspeakable atrocities. Hitler, Musolini to name just a couple.
Everything the government is 100% out in the open (except for ongoing police investigations - but the moment they are finished they are made public). There are only direct elections and almost all decisions are don via general elections. The whole population is well educated on all issues that are subject to politics so they can make informed decisions when voting.
This is of course unfeasible. The only way to make something like that feasible would be to link up our minds like the Borg. Still, the current state is not good enough.