My hon. Friend raises an important point. There are a number of behavioural effects. Sometimes when we have this debate, there is a tendency for Opposition Members to say, “Ah, behavioural effects. You are just talking about tax avoidance.” Tax avoidance can be an element, but it can also be behaviour that is clearly compliant both with the letter and the spirit of the tax system yet will reduce yield. Increasing contributions to pension schemes, for example, could result in a reduction in revenue. It could be that somebody decides to relocate out of the United Kingdom. It could be—an important point that gets to the heart of why we reduced the tax— that international businesses in deciding where to locate staff might conclude that the costs of doing so in the UK are greater than elsewhere, and that there are better climates and environments in which to locate highly paid staff.
Those are some of the behavioural impacts that are a consequence of having an uncompetitive rate of income tax. That is one of the challenges that Governments have to face. To be fair, the previous Labour Government, for the vast majority of their time in office—this point has already been made by my hon. Friend the Member for Redcar (Ian Swales)—did not increase the 40p income tax rate. Tony Blair was very clear that in his view increasing the rate above 40p would be a mistake. We have taken the view that it was right to reduce the rate down to 45p, but the important question remains of what is the purpose of having a high rate of income tax. Is it to raise revenue or is it simply about sending a signal? If it is to raise revenue, we have to ask ourselves how much it will raise.
This is why I return to the comments—I cited them accurately and in context earlier—made by the shadow Chief Secretary on 5 November:
“We have a choice about a tax rate”—
he is clearly talking about the 50p rate—
“that would raise £3 billion, and it is important that we take that opportunity to tackle our deficit, rather than giving that money away to those people who are already in an extremely privileged position.”—[Official Report, 5 November 2014; Vol. 587, c. 849.]
He is talking about raising £3 billion. I pressed the hon. Member for Birmingham, Ladywood (Shabana Mahmood) on two or three occasions because she was making a different argument. She was saying that the static cost is
£3 billion, and then it is a question of working out what the dynamic and behavioural effect will be so that we have a true and accurate position on how much this tax will raise. That is a perfectly reasonable point—it is not possible to disagree with the fact that there is a static number, but that is not terribly helpful in guiding us towards a sensible policy, because we have to know the behavioural effects. Let me be clear. The hon. Lady is clearly stepping away from the suggestion that this will raise £3 billion—