Yes, there are good leaks and bad leaks if you're the government. When you have "leaks" of the size of the Wiki-Leaks it is quite possible that there are "good" leaks . . . at the end of the day, what has the Wiki-Leaks done to the US government besides tell all of us who have been paying attention what we already knew?
But what better to ensure that you can go out and rally the lemmings and convince them that we need perpetual war, a perpetual massive military prescence (in the middle east) and massive military and DHS budget and infrastructure than to have more countries fall to the current set of neccessary bad guys and then claim the bad guys are "exporting" their ill will all across the world.