joefromchicago wrote:That's true only if the Laffer Curve works, and there's no evidence that it does.
There is ample evidence that the supply-and-demand model works. Admittedly, to assess this evidence adequately, one needs more knowledge of econometrics than one can reasonably expect in an online community of laymen. This is why I'm reluctant to discuss the evidence directly here. What I will say, though, is this:
If the model of supply and demand applies to the labor market, and
if the labor market is competitive to an acceptable approximation, there will be something like a Laffer curve.
That's why no card-carrying economist, not even a socialist economist like Abba Lerner, denies that tax rates have
some effect on the supply of labor and the demand for it, and that. No economist denies that there is, in principle, a point at which people cease putting in extra hours at work to evade the tax on it.
But when economics textbooks give examples of such regimes, they tend to include the tax rate on cigarettes in New York (several hundred percent I understand), or the 90 percent that applied before the Kennedy tax cuts. No serious economist, on the other hand, no matter how conservative, takes seriously the supply-siders' claim that America's labor market is currently on the prohibitive side of the Laffer curve. That's why even Greg Mankiw, a dyed-in-the-wool Republican who once served as Bush's own chief economic advisor, called supply-siders "charlatans and cranks [...] selling snake-oil."
There's plenty of room to ridicule supply-siders without denying the law of supply and demand. (But of course it's your argument, Joe, so don't let me stop you.
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