Sorry to be a wet blanket, but EVERY major government already has the capability to spy on every email and phone call. My late father’s only job in Miami at Southern Bell in the 1960’s was to tap phones for the government on the frame. It’s much easier now.
But Britain figures it needs 12 billion pounds to ramp up their infrastructure to capture all transmissions. I wonder how much the US would need? (Not that I want them to).
True, but unlike many, we still have due process under the Constitution. Whether or not that means anything anymore is arguable.