Ok, I don't understand the problem or the lies, here. This particular problem, I'm familiar with, as I've heard Homeland Security types discuss it. You have a wiretap for a specific phone line - you get a court order. He switches phones - you get another. He does this again, again, again - *within* the context of a SINGLE PHONE COMMUNICATION. Switch, switch, switch. It's a tactic already used by drug dealers. It's not, he changes phone companies - he has like, 20 phone lines and switches them, constantly - within a FEW MINUTES. You *cannot* get court orders fast enough to keep up with him.
What you NEED is a law that allows you to wiretap the *person*, regardless of what line he's using. Kind of the anti-terrorist version of a per-seat license versus a server license - because he's not going to just hold still and LET you monitor him.
Guess what? We've had that capability. I think it's great we can outfox terrorists. For pity's sake, in our own country, in time of war, we censored mail coming back from the front (in WW2). You're saying we *shouldn't* track communications *specifically* designed to catch terrorists? I can't see the problem here.