Remember that man in overalls sweeping the floor of the Space Center at Cape Canaveral, who, when asked by JF Kennedy ‘What do you do here?’ replied: ‘Mr President, I’m helping put a man on the moon’? The point was he didn’t say, ‘I just come in and sweep the floor’. Then there’s the story of the man cutting stone for the construction of St Paul’s Cathedral, who when asked the same question by Sir Christopher Wren, told him: ‘‘I’m helping Sir...