The Royal Commission

Hey, listen up, buttercup. So, you got a priest, who's supposed to be all holy, a Rhodes Scholar, who's brainy, and a politician, who's... well, a politician. Stick 'em in a room, and what do you get? A Royal Commission – which is basically when the government looks into something messy. Or, you get Tony Abbott, who was a politician, so the joke is implying politicians are bad.