THERE are two main reasons for a country to paw around in its tax code: to create more economic growth, or to repair a structural deficit. Any politician who wishes to quietly give money to friends or kill a troublesome programme will supply one of them. He will either say “businesses need tax certainty to grow” (meaning: “certainty that they will like the tax code”), or “we don’t have the money”. So as the Trump administration releases its tax plan on April 26th, there are only two questions to ask: whether it will speed up America’s current economic recovery, and whether it will begin to fill in the country’s long-term deficits. If the early leaks from the White House are any guide, it will do neither.