“The single most brilliant takedown of the GOP’s economic approach that I’ve read perhaps ever.”

I just grabbed the whole thing from MYDD…

Though I largely hold that trying to understand Republican economics is an exercise in futility, credit Martin Wolf, the chief economics commentator at the Financial Times, for writing the single most brilliant takedown of the GOP’s economic approach that I’ve read perhaps ever. In a column entitled The Political Genius of Supply Side Economics details the transformation of the GOP from the party of the responsible frugality of Dwight D. Eisenhower to the party of the irresponsible profligacy of Ronald Reagan and George W. Bush.

To understand modern Republican thinking on fiscal policy, we need to go back to perhaps the most politically brilliant (albeit economically unconvincing) idea in the history of fiscal policy: “supply-side economics”. Supply-side economics liberated conservatives from any need to insist on fiscal rectitude and balanced budgets. Supply-side economics said that one could cut taxes and balance budgets, because incentive effects would generate new activity and so higher revenue.

The political genius of this idea is evident. Supply-side economics transformed Republicans from a minority party into a majority party. It allowed them to promise lower taxes, lower deficits and, in effect, unchanged spending. Why should people not like this combination? Who does not like a free lunch?

How did supply-side economics bring these benefits? First, it allowed conservatives to ignore deficits. They could argue that, whatever the impact of the tax cuts in the short run, they would bring the budget back into balance, in the longer run. Second, the theory gave an economic justification – the argument from incentives – for lowering taxes on politically important supporters. Finally, if deficits did not, in fact, disappear, conservatives could fall back on the “starve the beast” theory: deficits would create a fiscal crisis that would force the government to cut spending and even destroy the hated welfare state.

In this way, the Republicans were transformed from a balanced-budget party to a tax-cutting party. This innovative stance proved highly politically effective, consistently putting the Democrats at a political disadvantage. It also made the Republicans de facto Keynesians in a de facto Keynesian nation. Whatever the rhetoric, I have long considered the US the advanced world’s most Keynesian nation – the one in which government (including the Federal Reserve) is most expected to generate healthy demand at all times, largely because jobs are, in the US, the only safety net for those of working age.

True, the theory that cuts would pay for themselves has proved altogether wrong. That this might well be the case was evident: cutting tax rates from, say, 30 per cent to zero would unambiguously reduce revenue to zero. This is not to argue there were no incentive effects. But they were not large enough to offset the fiscal impact of the cuts (see, on this, Wikipedia and a nice chart from Paul Krugman).

Indeed, Greg Mankiw, no less, chairman of the Council of Economic Advisers under George W. Bush, has responded to the view that broad-based tax cuts would pay for themselves, as follows: “I did not find such a claim credible, based on the available evidence. I never have, and I still don’t.” Indeed, he has referred to those who believe this as “charlatans and cranks”. Those are his words, not mine, though I agree. They apply, in force, to contemporary Republicans, alas,

Since the fiscal theory of supply-side economics did not work, the tax-cutting eras of Ronald Reagan and George H. Bush and again of George W. Bush saw very substantial rises in ratios of federal debt to gross domestic product. Under Reagan and the first Bush, the ratio of public debt to GDP went from 33 per cent to 64 per cent. It fell to 57 per cent under Bill Clinton. It then rose to 69 per cent under the second George Bush. Equally, tax cuts in the era of George W. Bush, wars and the economic crisis account for almost all the dire fiscal outlook for the next ten years (see the Center on Budget and Policy Priorities).

Today’s extremely high deficits are also an inheritance from Bush-era tax-and-spending policies and the financial crisis, also, of course, inherited by the present administration. Thus, according to the International Monetary Fund, the impact of discretionary stimulus on the US fiscal deficit amounts to a cumulative total of 4.7 per cent of GDP in 2009 and 2010, while the cumulative deficit over these years is forecast at 23.5 per cent of GDP. In any case, the stimulus was certainly too small, not too large.

The evidence shows, then, that contemporary conservatives (unlike those of old) simply do not think deficits matter, as former vice-president Richard Cheney is reported to have told former treasury secretary Paul O’Neill. But this is not because the supply-side theory of self-financing tax cuts, on which Reagan era tax cuts were justified, has worked, but despite the fact it has not. The faith has outlived its economic (though not its political) rationale.

The sad fact remains that too many Americans believe that taxes are too high (reality: among OECD countries only Mexico, Turkey, Korea, and Japan have lower taxes than the United States as a percentage of GDP) and perhaps worse too many Americans believe that the only road to economic prosperity is cutting taxes. In this they have been duped by the GOP but we too are culpable in that we have not successfully made the case that a progressive tax scheme not only produces a more egalitarian country but a more broadly prosperous one.