Sting is reportedly worth £200m. If you accept that his fortune was built primarily on the writing of 10 key hit singles of roughly four minutes each in length, that works out, on an admittedly crude measure, at £5m per minute of music. That's luck, some say. Well, yes, undoubtedly. But it is also about skill: in the late 1970s and early 1980s, Sting possessed an uncanny knack for coming up with songs that resonated both with mainstream radio and with rock audiences: by the time the Police went their separate ways in 1984, they were the biggest band in the world...