[javajosh]

...if they think the law is bad, can change the behavior by changing the Parliament.

If the people voted for one law allowing surveillance, then yes, your point is perfectly made. But these behaviors cropped up extra-legislatively through tortured interpretations of existing law, which implies there is a much bigger problem with western liberal governments circa 2014.

I'm not a historian, but this tendency to do a creeping, secret expansion of power based on secret legal interpretations of existing law feels very new, and very insidious, and I believe is actually the greater problem than the surveillance itself, and it's not clear at all that Parliament could pass a law fixing that problem.