A change in elites can also be expensive, with the outgoing group snatching what it can before leaving and the incoming group working overtime to ensure that it too gets paid in full.

Rather than being tired, bad-tempered under-achievers , they are an energetic, outgoing and optimistic group who can happily and healthily get by on just four or five hours of shut-eye a night.

The group made him in charge of reviewing all outgoing work for errors, giving his critical eye a purpose, with great results.