Can countries lower taxes and raise revenues?

RARELY has a dinner-table scribbling created such a legacy. In 1974 Arthur Laffer, an economist, sketched a simple diagram on the back of a napkin to illustrate a truism of tax policy. Set income-tax rates to zero and governments will not collect any revenue. Set them to 100%, and they will also collect nothing because people will have little incentive to work. Somewhere in between lies a sweet spot where government revenues are maximised. From this simple proof, it follows that when tax rates are very high, it might be possible both to lower tax rates and raise revenues. Tax cuts might thus pay for themselves, and more.