Democrats hate the thought of anyone determining their own fate and Republicans want to prevent anyone from enjoying the same advantages they do.
And once you accept such a premise - that everyone who disagrees with you is acting in bad faith - how could you possibly behave any differently than the NSA did? After all, you are surrounded by Fifth Columns trying to subvert the nation for whatever reason. What else can you do but keep them under surveillance in hopes of catching them in the act?
This is what's really wrong with American political process: treating political opponents as enemies. Democracy works because everyone gets to make their case without having to resort to violence. Democracy is efficient because every viewpoint gets represented and thus considered. But there's also the temptation to simply hurl mud on one's opponents rather than argue one's policies on their merits, and for whatever reason that's the road US has taken. It's a flaw that needs to be corrected.
Both Parties have become useless to the majority and only serve specific, rabidly vocal special interest groups.
So both parties listen to the voters, otherwise being rabidly vocal would have no effect. So rather than complain that they can't read your mind, why don't you learn from these special interest groups and start your own? Because "Party X only listens to me if I speak" is not exactly a damning judgement, at least not on the party.