The only simple thing here is his narcissism. We can prove this by the simple fact that he didn't raise his concerns within the organization, nor with his local representatives, nor with Federal government representatives. Instead, he sold his story to newspapers and went hawking himself around to various oppressive governments...
Compare David Kelly. We all knew what was going on. We didn't need it served up on a plate. I very much doubt that any good has come of Snowden's massive exposé, because if we forget Kelly, then we can just as easily forget Snowden. Meanwhile, the government spying on its people will continue. It will reorganise, regroup, and redouble its efforts.
Put it this way. If you were in charge of a set of surveillance programs that have had their cover blown, what would you do? Lay down and take it? Wind them all down and say "Oh well lads & lasses, the game's up!"? No. You beg for increased secrecy and more funding to start up new, better, deeper surveillance programs.
But no, you go ahead and rub Snowden's ego for him. He likes that sort of thing and it's chilly this time of year round those parts. Plus, it sells newspapers and ad impressions and gets people to go to all sorts of sites while they're still logged into Facebook and Twitter and G+.