Because right now people have access to GPG and can send information reasonably securely to journalists.

But don't worry, a 3 [or 4] letter agency near you is working real hard on that.

The stuff about terrorists can wait as that's not quite as important as stopping you knowing about what the agency is up to. The supposed masters in charge of limiting them - government ministers - are willfully compliant in the manipulation and deceit.

[edit:spelling; I wish english was my first language.]