> * Not being blown up by terrorists
Disregarding the fact that most of those items have nothing to do with government surveillance, this particular item has more to do with the fact that attempted (and competent) acts of terrorism are an extremely rare event.
The CIA and FBI failed to stop 9/11 when they failed to exchange relevant information [1]. Lack of actionable data was not the problem then, and I have a hard time believing it's a problem now.