Many of our problems are home-grown. Gordon Brown regularly advised the rest of the world to follow his British model of growth. But the model was flawed. It led to the highest level of household debt in relation to income in the world.

I am going to confront the old-fashioned negative thinking which says that all government needs to do to generate growth is cut worker and environmental protections, cut taxes on the rich and stroke 'fat cats' until they purr with pleasure. I'm completely repudiating the idea that government has to get out of the way.

Regulators are a backstop: they don't own banks. The governance at the top of our leading banks has been shown to be lamentably weak. No one at the top of Barclays will take responsibility for systemic abuse.

The degree of leverage now being reversed is on a staggering scale, and the underlying global imbalances – notably between the savers and the spenders – will require long and painful adjustment.

My college, Fitzwilliam, was pretty good but unfashionable and I lived in digs so I was not part of the cloistered 'old college' environment, which frankly was a bit intimidating. But I worked hard and settled in by exploring politics and girls.

We have sectors of the economy, aerospace is a good example, where Britain's probably the second country in the world, the automobile sector, where we've done extraordinarily well, an enormous amount of investment over the last couple of years, life sciences is another.

On banks, I make no apology for attacking spivs and gamblers who did more harm to the British economy than Bob Crow could achieve in his wildest Trotskyite fantasies, while paying themselves outrageous bonuses underwritten by the taxpayer. There is much public anger about banks and it is well deserved.