Two posts from another board on the general subject from years ago that I saved so I would not have to retype every time. They will be a bit out of context but will make the point. I've given up trying to battle supply-siders with empiricism. Like irredentist Marxists, they ignore the verdict of history based on ideology. It's like expecting an Ostrich to fly because it has feathers. They use numbers, but they can't make them work
This is the statement that I took issue with
In its literal sense, its true, but its patently false in implication. Tax revenues rise every year just due to inflation and the time value of money. In Reagans case, the Laffer Curve predicted that revenues would rise beyond the normal increase
due to the tax cuts, as an
effect of those cuts.
Thats patently false, often disproven, which is why the author is trying to rebut Mankiw by semantically making an argument disproven by that facts. In point of fact, all empirical evidence debunks the Laffer Curve, at least against the data points of the 80s and 90s (I had an earlier exchange with MOI on his point, and agree it could theoretically apply at certain rates much higher).
Its dishonest to advance a significant public policy issue based on utter falsehoods about what occurred in the past. If youre going to sell tax cuts, make the moral case, or whatever honest case you want to make. But if the public is worried about the effects on the deficit, dont lie by saying that the cut itself will increase collections, and then double that lie by saying history confirms that, when the opposite occurred.
To Bushs credit, this is the one lie his Administration hasnt advanced on the issue. He has repeatedly lied on the trifecta, lied during the campaign about the fact that 25% of the surplus was still available for the rainy day, had OMB lied about the causes of the resurgent deficits, and lied during his SOTU speech by suggesting that the size of the tax cut was justified by rebates that were proposed by his opponents and which are utterly irrelevant to the size of the tax cut. Those arent differences in opinion, theyre lies. You can keep making all the Clinton jokes you want while praising Bushs integrity, but Bush routinely and repeatedly lies on tax/budget issues.
Others have raised the Laffer Curve argument before, parroting Rush and the WSJ, who state it
ad naseum. Its always the same - total tax collections doubled during the Reagan era, which is true,
thereby proving that his tax cuts increased collections, which is false.
Heres why its false.
Historical tax collections are available here:
http://www.irs.ustreas.gov/pub/irs-soi/98db09co.xls
These arent in constant dollars, which I will address below. Columns 4 and 5 are operative. You will note that individual collections actually
decreased from 82 to 83. You also have to correlate the changes in tax policy, detailed here (a liberal site, but you cant challenge the accuracy)
http://resurgent.virtualave.net/TaxTimeline.htm
In 82 dollars (use the 96.5 multiplier from here -
http://resurgent.virtualave.net/Inflation&CPI.htm), the path from 82 to 89, broken down by Income tax rates, which Reagan originally cut (and subsequently signed bills which partially reversed), and FICA rates, which were consistently raised, shows that income tax collections dropped in the two years following the cut. After the 84 and 86 partial repeals, collections increased again, but still no increase like the Laffer Curve predicts, and this doesnt even account for an approximate 9% increase in the workforce, which skews it even farther. FICA collections jumped significantly, more than double that of income tax rates. Over 2/3 of the increase in collections that WSJ and Rush tout occurred here. But thats the exact opposite of supply-side theory, as FICA rates were
increased. Plus, they should be more sensitive to supply side theory, as dollar one is effected.
In short, the Laffer Curve was debunked in the 80s, by empirical data you can check yourself. The statements made above are deliberately intended to deceive. If you want to sell your plan honestly using other stimulative effects (Keynesian), or just a moral argument, those are honestly debatable. Whats not honestly debatable is to repeat that the Reagan tax cuts produced increases in revenue and proved the Laffer Curve. Thats false.
Like Bob Sommerby said about the Al Gore/internal combustion issues:
BTW, here's your "dynamic environment"
Using dynamic scoring, the Administration admits that they were off by $412 billion, at least 25% of the whole tax cut ($1.6 through 2010 - they no longer add in the last two years, which are supposed to be the heaviest)!!!!! Despite that record, the Administration is still thinking we will get "dynamic" in the future, to wit:
IOW, we are assuming that $275 billion of the tax cut will be offset by growth attributable to that cut, despite the fact that every time we made that assumption in the past, it never happened.
Truly dishonest.