But the point is not to catch real criminals, the point is to dig up dirt on anyone and everyone, so when the time is right - you could use it to your advantage.
"Don't you see it's for your own protection, and for your children, protecting all of your from pedophiles, terrorists and the scary monster in your closet. And if you don't buy this argument, then obviously you are an enemy of the state, because if you don't have anything to hide - you have nothing to fear. Oh, and don't forget - arbeit macht frei."
Snooping agencies will fight tooth and nail to keep their snooping powers because they don't give a rat's behind about the read bad muthus out there - because that's entirely different playing field, you can't go after them directly, they are well protected and shifting balance includes a lot of political play, but the smaller fishes can be caught with a wider net, and to get leverage all you need is a right to snoop on anyone at any point in time. It's too convenient to give up.