After the First World War, when the western world came out of the chaos of trying to reshape Europe and the unimaginable horror that particular adventure produced, the world - well mainly America - went slightly bonkers and we got the Roaring 20s.

The Roaring 20s gave the world cars, electricity, jazz, the bob haircut for women, a decent number of really good cocktails, margin lending and cheap credit. That’s a hell of a decade.

Now, a century later, it looks like we are going to do the same again. High on the hog of disappointment, deprivation and cheap credit, it looks like we are goin...