Is it really? I think what he's trying to say is that we should have tools powerful enough to let the Government find/track people efficiently and correctly as long as there is a lawful reason for doing so. Its similar to the weak crypto arguments where Govt. agencies argue they should be able to break crypto protocols via a backdoor when there is a lawful reason to do so.

That being said: the PATRIOT act and NSA's PRISM program have shown just how blatantly the US Govt. can abuse individual privacy and rights so I don't think its a good idea. Weak crypto using backdoors is just a terrible idea period.

I guess what I'm trying to say is that the logic make sense in principle even though in practice it wouldn't work that way.