After Donald Trump became the Republican nominee, he was asked on Fox News about his views on NATO and other American alliances. He gave his familiar “they’re freeloaders” answer:

The fact is we are protecting so many countries that are not paying for the protection. When a country isn’t paying us and these are countries in some cases in most cases that have the ability to pay, and they are not paying because nobody is asking…. We’re protecting all of these countries. They have an agreement to reimburse us and pay us and they are not doing it and if they are not going to do that. We have to seriously rethink at least those countries. It’s very unfair.

This has of course been a repeated theme in his speeches and interviews. Another example: after the Democratic convention, Trump told John Dickerson on Face the Nation, “I want these countries to pay for protection”—“these countries” being the usual range of U.S. allies.

On Monday night, in his debate with Hillary Clinton, Trump essentially acknowledged that he might not be paying any federal tax himself. Here was the remarkable passage:

CLINTON: Maybe he doesn’t want the American people, all of you watching tonight, to know that he’s paid nothing in federal taxes, because the only years that anybody’s ever seen were a couple of years when he had to turn them over to state authorities when he was trying to get a casino license, and they showed he didn’t pay any federal income tax. TRUMP: That makes me smart.

That makes me smart. Among the several hundred people watching the debate at the site where I saw it, there was an audible gasp at this line.

Everyone tries to minimize taxes. But not many “normal” people manage to avoid them altogether, or even contemplate doing so. Most Americans, regardless of politics, resent the rigged nature of our public systems and look for ways to corner-cut annoying obligations (“Yeah, yeah, juries are really important, but I’d just as soon not get picked”). But most still recognize some basic obligations we all bear—school taxes even if we don’t have children, paying for highways or emergency relief even in places where we don’t live—to keep the system going as a whole.

You might call this mutual burden-sharing part of Making America Great Again. You could call it “the price we pay for civilization,” if you were Oliver Wendell Holmes. Or “paying for protection,” if you were Donald Trump.

***

I’m not sure Trump would recognize any tension between his own outraged demand that allies start paying their way, and his reflexive response that “it makes me smart” for him to avoid paying his own way. And I realize that his committed supporters might embrace both sentiments at the same time: Those foreigners are screwing us! And, at least one shrewd guy figured out how to keep the IRS from screwing him!

But I can imagine this staying on as a reminder of the gap between Donald Trump’s economic/civic role in society, and that of most of his supporters. It was one of several related moments in the debate—significantly, all of them coming in unprompted responses rather than the usual lines from his speeches: