Interesting angle. Makes you wonder if any politicians data was part of Snowden's haul. If so that opens up another can of worms.
If they didn't have segregated access (and it does not appear that they did) then that would have surely been too juicy to pass up. 20,000 documents is a lot.
This might also go some way to explaining the panic, if they don't know what he's got and he's had access to data like that then some people must really not be sleeping well right now.
Don't forget corporations and individuals. And of course blackmail. That could be very profitable, specially against powerful people, politicians...