My time at Shell was a most valuable experience because it taught me to look at the world in a long-term way. Shell takes a 20-year view on events and plans for different scenarios. It makes you see the world as a kind of large matrix.

For wide swaths of training and education there are valuable spillovers which mean that the private sector needs support from the government. That is why I have been so determined to protect and grow apprenticeships and put higher education on a sustainable footing.

Banks operate like a man who either wears his trousers round his chest, stifling breathing, as now, or round his ankles, exposing his assets. We want their trousers tied round their middle: steady lending growth; particularly to productive British business, especially small scale enterprise.

I have managed to infuriate the bank bosses; acquire a fatwa from the revolutionary guards of the trades union movement; frighten the 'Daily Telegraph' with a progressive graduate payment; and upset very rich people who are trying to dodge British taxes. I must be doing something right.

Billions of taxpayers' money has been wasted in bad deals. The London Underground modernisation, personally negotiated by one of Gordon Brown's team, was a disaster, as the National Audit Office has confirmed.

The economy has become seriously unbalanced. Its growth has not been driven by investment or by overcoming Britain's long-standing weaknesses in investment and productivity, particularly skills. Instead, there has been a binge of debt-financed consumer spending.

The Robert Mugabe school of economics provides a salutary warning about uncontrolled monetary expansion in generating hyper-inflation. The road to Harare is not as long as we might hope.