On the other side of the ‘glamorous’ coin, very few of those who want their picture on the front cover of Vogue, or wish to become a movie director or to run the coolest PR company in the world, get to achieve anything. The reason is obvious. The laws of supply and demand are absolute – and they apply not only to commodities, but to people. Too many people want to make a blockbuster movie and live in Beverly Hills. Not enough people want to dig holes.