The NSA shouldn't just be an attacker it should also provide defence. If one of their many contractors can leak details to the press for idealogical ends it's pretty safe to assume that much worse secrets have already been leaked to other nation states (China, Russia etc....) for financial gain.

I think it's entirely reasonable to assume that a lot of exploits the NSA has discovered and not revealed (because it thinks they are "secret") have actually been sold to other governments by it's own contractors. By not revealing these exploits to citizens they are actually leaving them open to attack by foreign governments. Large companies trying to defend against industrial espionage are probably most at risk.