Tyler Cowen's modest proposal for an imaginary GOP

Tyler Cowen would have Republicans shake up the tax debate by proposing a tiny across-the-board income tax hike in addition to the moderate tax hike for the wealthy proposed by President Obama. Further tax hikes would then kick in automatically as (or if) spending rises. He regards this direction for tax reform as fairer and more sustainable than current proposals, as everyone would feel the effects of "paying" for whatever level of social services and other spending we collectively undertake. Here's the meat of it:

To see how this could work, consider this script: Let’s say the Republicans decide to largely give in to what the President Obama is proposing. There is, however, a catch: the president has to agree to raise marginal tax rates on all income classes, not just on the rich. The tax increase would be one-quarter of a percentage point, or some other arbitrary small amount, with larger increases possible for higher incomes, as has been discussed. The deal also stipulates that both the president and Congress must publicly acknowledge that current plans for government spending can’t be financed unless taxes on most or all income groups climb further yet, and by some hefty amount. 

Chaining ourselves to (slightly) higher tax rates

I was going to suggest a couple of potentially good things about chained-CPI, a slower and allegedly more accurate measure of inflation than the one currently in use, as a means of boosting tax revenue. Josh Barro slowed me up. Having criticized chained-CPI as a means of reducing Social Security benefits, which Barro believes should be indexed to income growth rather than inflation, he moves on to taxes:

Inflation indexing of the income tax code also makes little sense. Every year, income tax brackets are adjusted upward in line with CPI. So, while the 25 percent federal income tax bracket started at $34,500 of taxable income in 2011, it doesn't start until $35,350 for 2012. But, except in recessions, incomes tend to rise faster than price inflation. That means that, absent changes in tax law, a taxpayer at any given place in the income distribution will face a higher effective tax rate over time.

This effect is called "real bracket creep," and it’s undesirable if we want a tax code that produces stable collections and a stable distribution of the tax burden over time. Indexing tax brackets to national income would cause the bracket thresholds to rise faster, eliminating real bracket creep.

Where taxes are always too high

Another day, another deeply misleading screed on taxes by a Wall Street Journal editorialist - in this case, Stephen Moore. Democrats, he warns, are proposing tax increases that will bring us "back to the taxes that prevailed under Jimmy Carter, when the highest tax rate was 70%."  By adding together every tax increase that any Democrat is currently proposing, along with every increase implemented under Bush Sr. and Bill Clinton, he gets to an ill-defined "tax rate" of 62%.  That's hardly 70%, (or the 91% top marginal income tax rate that prevailed under Eisenhower), but what's an extra 8% among scare tacticians?   

Moore would have us believe that federal taxes have been climbing relentlessly since the halcyon days of Reagan's second term, when the top marginal income tax rate was, he says, 28% (it was actually 33% in a bracket below the top bracket).  Never mind that federal tax revenue as a percent of GDP is currently lower than it was at any point in the Reagan years, and is in fact at its lowest point since the early 1950s. To paint this picture, Moore needs almost one distortion per paragraph. A sampling:

Bracketing up: will Obama soak the superrich?

Given Americans' immersion in low tax ideology, how can Obama fund his ambitious plans long-term? Matthew Yglesias floats an idea that occurred to me years ago:

some day I should write again about the idea of making tax brackets infinitesimal so that there is no “top bracket.” This would have been unworkable 100 years ago, but with computers there’s no reason we can’t do it.

In other words, there should be an algorithm for perfectly progressive tax rates that ratchet up infinitesimally for every dollar earned, rather than bumping up abruptly at fixed thresholds.

More prosaically, Yglesias floats the idea of adding new marginal tax brackets above the current top level ($357k). While he minimizes the potential for raising significant revenue this way, Nate Silver starts the math and finds otherwise:

What the discussion over the top marginal tax rate ignores, however (and what Ygelsias picks up upon) is that this rate has been assessed at very different thresholds of income. In 1940, for example, the top marginal tax rate was 81.1 percent -- but this rate only kicked in once you made $5,000,000 or more in income, which is equivalent to about $75,000,000 in today's dollars.

But today, the threshold where the top tax bracket kicks in isn't $75 million, or $5 million, or even $1 million ... it's a mere $357,700. The progressivity of the tax code stops there....

The question, of course, is why there isn't a millionaires tax bracket now ... or even a multi-millionaires tax bracket. I haven't run the numbers, but I'm guessing that if you established a new tax bracket at, say, 40.5 percent, that started at incomes of $1,000,000 or more, this would bring in as much revenue to the government as restoring the $250K tax bracket (which is really $360K now given indexing to inflation) to 39.6 percent, as it was under Clinton.

Brushing this subject without quite hitting on it, meanwhile, Clive Crook gives the rationale for creating new upper-level brackets -- though he himself favors the regressive but broader-based VAT:

Not everybody would regard two-earner households with an income of $250,000 a year as rich; and many of the taxpayers in question have seen their retirement savings, college funds and housing equity destroyed. The scandal of widening inequality that still animates the Democrats' thinking is a story about the top fraction of one per cent of the income distribution, not the top end of the middle class.

I wonder if Yglesias hasn't in fact stumbled on Obama's as-yet-veiled long range tax plans. Obama claims that he is going to tackle the long-term sustainability of the Federal budget; he's meanwhile planning large increases in Federal spending while promising not to raise taxes on anyone earning under $250k; and a core commitment in his campaign was to roll back the galloping rise in income inequality that Crook alludes to. There is a lot of wiggle room to raise taxes on the superrich while staying well below past U.S. norms. It's probably either that or a VAT. Or both...