Paul Johnson and the enormously respected Institute for Fiscal Studies aim to hold Government to account – without which politicians will get away with their half-truths, elisions and dubious claims.

This is a forensic examination – by the man best placed to do so – of the way the state raises and spends £1 trillion of our money every year. To follow the money. To provide an explanation, of where that money comes from and where it goes to, how that has changed and how it needs to change.