Earlier quoted context omitted.
But what if there are quantitatively and qualitatively more full-time, well-funded cryptographers inside the NSA (and its collaborating sibling organizations in its close allies) than outside? They may have an internal system, with geographically-distributed schools of thought, specialties, and long-running debates, as rich and open as the outside world - just completely segregated. At least, that's how I'd do it, if…
How do you keep all that so secret for so long?
On the other hand, if you reveal the programs, you lose your job, get cut off from your professional colleagues, and likely go to jail.