Let us take another tax where very clearly a lower rate has produced a lot more revenue: the higher rate of income tax. Labour wisely kept the highest rate of income tax at 40% throughout most of its time in government, knowing it was the way to attract people with money into the country, to attract investors and entrepreneurs, and to encourage people to take more risks. It set a more penal rate just as it left office, as a kind of tax trap for the Conservatives. When the Conservative Chancellor eventually summoned up the courage to lower the rate from 50% to 45%, there was a big surge in revenue.
As one of my colleagues has already pointed out, there was an even bigger surge in revenue when a previous Conservative Government cut the rate from 80% in two stages to 40%. The amount of tax went up in cash terms and in real terms, and the amount of tax paid as a proportion of the total by those on the top rate went up. It was a win, win, win. I would urge the Chancellor to reconsider reducing it back down to 40% because he would collect more revenue and provide that stimulus to enterprise.
I hope that the Government will think again about a couple of tax rises that have been deeply damaging to our economy. The first is the rise in car tax, or vehicle excise duty. The graph showing car sales and output in the UK was increasing progressively between the Brexit vote and the spring Budget of 2017, but it then fell very sharply, and we now have a serious problem. The tax attack on diesel cars, allied to the threat of more controls on diesels, has been particularly damaging. Governments of both persuasions have gone out of their way to attract a lot of inward investment, and new investment, in diesel output and diesel vehicles. They encouraged that, only then to kick the props away and make such investment very difficult.