LONDON – The most successful socialist society on earth goes to the polls on Sunday. It is not the socialism of Lenin, and certainly not of Mao. Nor, at the other extreme, is it the New Labour type of Tony Blair. Yet it is the socialism that the dreamers, thinkers and writers from Voltaire to George Bernard Shaw to Galbraith always imagined – a successful mix of human endeavour with human compassion, where the doors of a classless education are open to everyone, where it is not too difficult to get ahead, where you can make money, but you have to share it – with those who are not having it so good today and with yourself at some future age when you might be ill, infirm, lonely and unemployed. On the other hand, if you don’t miss a step and you die comfortable you can leave every penny to your...