I suppose it depends on which you consider more important: the government itself, or the ideals it ostensibly represents. One can easily come to the conclusion that the damage to the government is acceptable, if the damage is necessary to correct damage the government has done to the people.

I have no doubt that Snowden is interested in what actions are taken to prevent future abuses. Reading his statements after his identity was revealed, it's clear he left not because he doesn't care, but because he saw leaving the US as the best way to preserve his ability to contribute to his cause and remain safe.