What do laws matter?
...when you're above the law?
That's the real point of all this for the spymasters. They believe they are above/below/outside/ARE the law, and have to answer to nobody. Ergo, their actions should be secret, without oversight, without redress or recourse. They will never accept being reined in, and in the unlikely event restrictions are passed they will simply ignore them, like they're ignoring our legal protections now.
Oversight? Limits? Even if you add restrictions, what the hell is anyone going to do about violations? NOTHING. Just like has happened since Ed Snowden ripped the mask off.