"Anybody who was a politician at one stage - when they were at the "I'd like to be a train driver" stage of their lives - must also have thought: "I'd like to make the world a better place if possible." So, I think that's why most politicians go into it. They don't want to take over the world and most go into it for good reasons and then, presumably, are beset by endless things stopping them from following their natural inclination to do the right thing."