The 2016 presidential race has been most notable for the Republican candidate's utter refusal to bring anything of substance to the debate. Donald Trump pointedly avoids nearly all policy details in favor of childish insults, empty sloganeering, and lately, deranged outbursts. In the past week alone he called President Obama "the founder of ISIS," and suggested that "the Second Amendment people" were the only ones who could stop Hillary Clinton.

How Fox News Deceives and Controls Their Flock: Fox Nation vs. Reality, The Fox News Cult Of Ignorance.

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That's what makes it so surprising when a prominent spokesman for the right-wing agenda says something that actually makes sense. This happened Friday on the Fox Business Network during a discussion on the "Dueling Economic Visions" of Trump and Hillary Clinton. Host Charles Payne introduced the segment and turned to economist Ben Stein to give his opinion of the Trump economic plan. What happened next was completely unexpected:

Stein: Well I don't think Mr. Trump's plan is going to work very well. I don't think we need that tax cut when we’re running deficits the size we are running. I think the evidence that tax cuts stimulate business in any kind of meaningful way, at least not sufficient to overcome the tax revenue loss, is extremely poor to put it mildly. I think the idea of cutting taxes on the rich in a time when there is so much concern about inequality is not a good idea. I do think his idea of greatly lessening environmental regulation is absolutely necessary and even brilliant and very brave of him.

Exempting that anti-environment nonsense at the end, Stein delivered a coherent explanation for why giving the wealthy a tax cut makes no sense. In fact he argued that such favoritism for the rich was never a stimulant to the economy and would only exacerbate deficits. Add to that his expression of concern for income inequality and you have a truly astonishing display of wisdom from a right-wing economist.

Fox of course would not be satisfied with that blasphemy. Therefore, Payne turned to Betsy McCaughey, the woman who coined the term "death panels," for rebuttal. McCaughey was just named to Trump's team of wingnut economic advisers. She ranted:

McCaughey: First of all, Donald Trump's tax plan will produce an enormous amount of economic growth. The key factor is slashing the corporate tax rate, currently the highest in the world, down to fifteen percent. Companies in the United States are being taxed to death. And that's why so many of them are leaving or retrenching their business investments.

There is so much wrong with that it's hard to know where to begin. Let's start with the fact that there is no evidence that Trump's plan would produce any economic growth. In fact. Moody's scored his plan and concluded that it would result in a "lengthy recession," 3.5 million job losses, and "very large deficits and a much higher debt load." Plus, every independent analysis of Trump's plan has affirmed that it benefits the rich far more than the lower and middle classes.

Then there is McCaughey's assertion that U.S. corporate tax rates are "the highest in the world." That is patently and provably false. It's a recurring right-wing trope that has been debunked innumerable times by non-partisan analysts. McCaughey and other conservatives deceptively cite the statutory corporate tax rate rather than the effective tax rate (what is actually paid after deductions). When reviewed with real numbers the U.S. corporate rate is actually slightly lower than the average of our international competitors. Often it is zero, or close to it.

[Note: These facts make it even more important for Trump to release his tax returns so that we can see just where in the range his tax rate lies.]

The truth is that American companies are not leaving the the U.S. for lower taxes. They are leaving for lower wages, cheaper distribution in foreign markets, evasion of fair labor and environmental regulations, and other reasons unrelated to taxes. McCaughey also claimed that the U.S. is on the brink of a "business recession" despite this being one of the longest periods of growth in decades. But then she trotted out a real whopper:

McCaughey: And let me just point out in response to Ben's comments about the poor and tax reductions for the rich - slashing the corporate tax rate and producing growth will benefit the poor the most.

That foolishness hardly merits a response. At this point host Charles Payne steers the conversation to "the debate over whether trickle-down economics really work." He asked Harvard Kennedy School Professor Leah Wright Rigueur "If the same tide lifts all ships, wouldn't that include the poor?" She responded that "You would think, but history has shown us that that doesn't include the poor." When Stein was asked to comment he poignantly noted that a rising tide "does not lift those boats that are under water." Which led to this epic exchange:

Stein: And if I may say to my friend the Lt. Governor, there simply is no evidence that slashing the corporate tax rate produces growth. There's a lot of allegations, but... McCaughey: [interrupting] That's ridiculous. Stein: Did you say 'That's ridiculous'? McCaughey: I said 'That's ridiculous'! Stein: With all due respect, I'm the one that's studied this. You're the politician. You can say whatever you want as a politician. There simply is no evidence of that. [...] You don't know that. You have no idea of that. You can say it but there's never been any data connecting those two.

Watching a devoutly conservative economic expert smack down the right's sacred trickle-down doctrine on Fox's own business network is both shocking and satisfying. But watching him also humiliate a Trump adviser, and one of the most extreme GOP partisans, at the same time is an event more rare than Halley's Comet. It will be interesting to see if Stein is invited back to Fox News any time soon.