By Andrew Haldenby Keir Starmer has reshuffled his top team, but he has still one appointment left to make: cabinet secretary. He should hire someone from outside the Whitehall machine to drive better performance across the public sector, says Andrew Haldenby If Keir Starmer wants a government that works and a productive economy, he needs to do more than reshuffle the political team in 10 Downing Street. He has one key appointment left to make: a new cabinet secretary who will be the 14 since the post was created 108 years ago. If he gets it right, he can put the whole operation of government …