@Nezumi-chan: Where are we getting the notion that he's principled? He was perfectly okay with all this until he got arrested. And this is about revenge, not ending tyranny. Wouldn't be surprised if he starts trying to spread the plague on purpose just as a fuck you to !psychic Theresa May.
@Sir Naff: There's the thing, though. He was offered a chance back in, and he didn't take it. Whether spite, or finding what they wanted him to do too far even for him, or whatever else, he refused. And he CONTINUED to refuse, even through torture, deprivation, and mind control. Even if it's out of sheer stubbornness and spite, when you take "I'm not working for people who screwed me over," THAT far, it becomes a principle in and of itself.