If the history of this century has been about anything so far, then it is the bargain of national security. A constant state of war carried out on a need-to-know basis.
Our governments of various political hues, the NSA, CIA, GCHQ, have constantly asked for, even demanded, our trust. We're keeping you safer, trust us. We're acting within the law, trust us. We need the powers we ask for (and many more you don't know about), trust us.