The evidence shows that almost all the problems that occur most often in the poorest neighbourhoods—including those that make us a broken society—are systematically more common in more unequal societies. Rates are not just a little higher, but between two and eight times higher. Wider income gaps make societies socially dysfunctional across the board.

Last October Cameron rounded on Labour, saying: "Who made inequality greater? No, not the wicked Tories. You, Labour. You're the ones that did this to our society. So don't you dare lecture us about poverty. You have failed and it falls to us, the modern Conservative party, to fight for the poorest who you have let down."

But the truth is that we are suffering the impact of the massive increases in income inequality under Thatcher, which Blair and Brown have since failed to reverse. In the 1980s the gulf between the top and bottom 20% widened by a full 60%—much the most dramatic widening of income differences on record.