The hon. Gentleman has made an interesting point about certainty and also about the difficulties that globalisation and the internet have caused for gathering corporation tax. Is there a case for the international community to give up on corporation tax and instead have higher taxes on sales and, if necessary, dividends, so that the tax is still raised in the end but we do not have a continual process of chasing money across international boundaries, which, for the reasons he has given, is time consuming and perhaps counter-productive?