I think that's a distinction which lacks a practical difference. Of course they have applications that don't involve enabling surveillance by three letter agencies. But you're kidding yourself if you don't think that every major advance in any remotely useful discipline isn't reviewed and employed by these agencies.
These groups don't just hire sys admins and suits and engineers to monitor signals, etc. They hire PhDs and researchers, both to help assess technologies and to develop them internally.
I guess the point is, the advance of technology must inevitably advance tha capabilities of the surveillance state.