I haven’t given the idea of combining tax reform with a rate hike much thought, largely because I’m so wary of reform in the first place. Two thoughts come to mind: All the distortions and breaks in the tax code become less important the lower the rates are. And if you’re doing a comprehensive reform, you’re probably better off politically reducing tax rates–you don’t want opponents of the reform to be able to say the whole thing is a tax-raising scheme.