“I care less about whether the top personal income-tax rate is 39 percent or 36 percent than I do about whether we can pick one and stick to it for a few decades at least, and, more generally, about ensuring that we do not undertake big and disruptive changes to the policy environment without real consensus and careful deliberation. But instead of that conservative approach, every time a party achieves a temporary majority in Congress or control of the White House, its leaders promise revolution and a radical reordering of taxes, regulations, incentives, terms of trade, and everything else they can think of. “