It should be a management consultant’s dream. The organisation is immense. The bloat is obvious. And the new boss is eager to shake things up. President Donald Trump and his disrupter-in-chief, Elon Musk, have already begun hacking away at America’s federal bureaucracy. Mr Musk’s Department of Government Efficiency (DOGE) has set itself the target of cutting government spending by a colossal $2trn.