At Tuesday’s Republican debate, candidates discussed two main questions about taxes: Should they be lower than they are now, or should they be way lower? And should there be fewer tax rates, or just one single rate for everyone, rich and poor?

On the first question, you might say the proposed tax cuts range from huge to yooooooge. Donald Trump has proposed a tax cut that would appear to lose about $11 trillion in revenue — a quarter of expected government revenues — over a decade. Gov. John Kasich of Ohio said that’s too much, because a tax cut that big “will put our kids way deeper in the hole than they have been.”

But even Mr. Kasich, despite his relative restraint, is proposing to cut taxes more deeply than George W. Bush did during his presidency and more deeply than Mitt Romney promised to in 2012. He would lower the top personal income tax rate to 28 percent from 39.6 percent, the top capital gains tax rate to 15 percent from 23.8 percent, and the top corporate income tax rate to 25 percent from 35 percent — an approach that would greatly increase the deficit, if not as greatly as Mr. Trump’s ideas would.