So, here's my take on all this 'surveillance is good for you'. It more or less proves (to me at least) that the government(s) and the various secret services have absolutely no idea who to monitor specifically. So instead of targeting their operations they want to monitor all of us, just in case something of interest pops out that then allows them to focus their attention. It's a pretty scary thought: just imagine, a…
There is way too much volume and noise to find threats in the hurricane of hay flying past to find the needles in real time.
But if you have someone specific to start targeting, you can quite easily take their whole life apart and find their friends and make all these connections after the fact.
The goal isn't to stop attacks, it's to ensure that nobody goes unpunished.