Isn't the whole point of pervasive authenticated encryption to prevent the NSA from "doing their job" (at least the spying part of it)?
> But it can shift the economy of the situation -- but you should think carefully what way you shift it.
It shifts more than the economy of the situation. It also forces a shift from passive attacks to active attacks, which are easier to detect and harder to justify. Forcing the attacker to justify their acts has a political effect.