The scene is Detroit, a training room at the headquarters of one of the three great US car companies. A group of corporate vice-presidents is attending a course being given by a distinguished management thinker.

“What you are telling us is great,” the VPs say, “but you are talking to the wrong level. You should be speaking to the next tier up.” The next week, working with more senior managers, he hears the same thing. “This is great, but you are talking to the wrong level. You should be speaking with the chief executive.”