Journalists like nothing better than writing about each other. It is good manners and a good discipline to wonder why anyone else should care. On the face it, no one should bother about television’s pecking order. As long as there is one good current affairs show, why does it matter if it is on Channel 4 or the BBC? But the reasons Newsnight’s journalists are leaving are not as parochial as they seem. They tell us how hard it will be not just for the BBC, but the civil service and judiciary as well, to maintain the “impartial” traditions of the 20th century in the new world.