Given the scale of the operation that the NSA appear to be running, I would imagine that it would be in the organisation's own interest to provide 'outward trajectories' for those employees who were developing doubts about the work they did. Better that (from the NSA's point of view) than a few dozen Snowdens.

I'd imagine a transfer from highly classified work to less highly classified work, followed over time with the opportunity to work with external contractors and then perhaps move into the commercial sector.