Supply-side economics

Fiscal Fights with Friends, Part I: Responding to Reihan Salam’s Argument against the Flat Tax

In my ultimate fantasy world, Washington wouldn’t need any sort of broad-based tax because we succeeded in shrinking the federal government back to the very limited size and scope envisioned by our Founding Fathers.

In my more realistic fantasy world, we might not be able to restore constitutional limits on Washington, but at least we could reform the tax code so that revenues were generated in a less destructive fashion.

That’s why I’m a big advocate of a simple and fair flat tax, which has several desirable features.

  • The rate is as low as possible, to minimize penalties on productive behavior.
  • There’s no double taxation, so no more bias against saving and investment.
  • And there are no distorting loopholes that bribe people into inefficient choices.

But not everyone is on board, The class-warfare crowd will never like a flat tax. And Washington insiders hate tax reform because it undermines their power.

But there are also sensible people who are hesitant to back fundamental reform.

Consider what Reihan Salam just wrote for National Review. He starts with a reasonably fair description of the proposal.

The original flat tax, championed by the economists Robert Hall and Alvin Rabushka, which formed the basis of Steve Forbes’s flat-tax proposal in 1996, is a single-rate tax on consumption, with a substantial exemption to make the tax progressive at the low end of the household-income distribution.

Though if I want to nit-pick, I could point out that the flat tax has effective progressivity across all incomes because the family-based exemption is available to everyone. As such, a poor household pays nothing. A middle-income household might have an effective tax rate of 12 percent. And the tax rate for Bill Gates would be asymptotically approaching 17 percent (or whatever the statutory rate is).

My far greater concerns arise when Reihan delves into economic analysis.

Grading the Rubio-Lee Tax Reform Plan

In my 2012 primer on fundamental tax reform, I explained that the three biggest warts in the current system:

  1. High tax rates that penalize productive behavior.
  2. Pervasive double taxation that discourages saving and investment.
  3. Corrupt loopholes and cronyism that bribe people to make less productive choices.

These problems all need to be addressed, but I also acknowledged additional concerns with the internal revenue code, such as worldwide taxation and erosion of constitutional freedoms an civil liberties.

In a perfect world, we would shrink government to such a small size that there was no need for any sort of broad-based tax (remember, the United States prospered greatly for most of our history when there was no income tax).

In a good world, we could at least replace the corrupt internal revenue code with a simple and fair flat tax.

In today’s Washington, the best we can hope for is incremental reform.

But some incremental reforms can be very positive, and that’s the best way of describing the “Economic Growth and Family Fairness Tax Reform Plan” unveiled today by Senator Marco Rubio of Florida and Senator Mike Lee of Utah.

Debunking the Debunking of Dynamic Scoring and the Laffer Curve

Many statists are worried that Republicans may install new leadership at the Joint Committee on Taxation (JCT) and Congressional Budget Office (CBO).

This is a big issue because these two score-keeping bureaucracies on Capitol Hill tilt to the left and have a lot of power over fiscal policy.

The JCT produces revenue estimates for tax bills, yet all their numbers are based on the naive assumption that tax policy generally has no impact on overall economic performance. Meanwhile, CBO produces both estimates for spending bills and also fiscal commentary and analysis, much of it based on the Keynesian assumption that government spending boosts economic growth.

I personally have doubts whether congressional Republicans are smart enough to make wise personnel choices, but I hope I’m wrong.

Matt Yglesias of Vox also seems pessimistic, but for the opposite reason.

He has a column criticizing Republicans for wanting to push their policies by using “magic math” and he specifically seeks to debunk the notion - sometimes referred to as dynamic scoring or the Laffer Curve - that changes in tax policy may lead to changes in economic performance that affect economic performance.

He asks nine questions and then provides his version of the right answers. Let’s analyze those answers and see which of his points have merit and which ones fall flat.

But even before we get to his first question, I can’t resist pointing out that he calls dynamic scoring “an accounting gimmick from the 1970s” in his introduction. That is somewhat odd since the JCT and CBO were both completely controlled by Democrats at the time and there was zero effort to do anything other than static scoring.

I suppose Yglesias actually means that dynamic scoring first became an issue in the 1970s as Ronald Reagan (along with Jack Kemp and a few other lawmakers) began to argue that lower marginal tax rates would generate some revenue feedback because of improved incentives to work, save, and invest.

Now let’s look at his nine questions and see if we can debunk his debunking:

Supply-Side Economics from the Founder of the Brookings Institution

“Within limits, the system of progressive taxation is defensible and effective.  Beyond a certain point, however, it dulls incentives, and may destroy the principal source of funds for new enterprises involving exceptional risks.”

–Harold G. Moulton (founder of the Brookings Instituion), Controlling Factors in Economic Development, The Brookings Institution, 1949, p. 292.

Laffer Curve Explains Why Obama’s Class-Warfare Tax Policy Won’t Work

My main goal for fiscal policy is shrinking the size and scope of the federal government and lowering the burden of government spending. But I’m also motivated by a desire for better tax policy, which means lower tax rates, less double taxation, and fewer corrupting loopholes and other distortions.

One of the big obstacles to good tax policy is that many statists think that higher tax rates on the rich are a simple and easy way of financing bigger government. I’ve tried to explain that soak-the-rich tax policies won’t work because upper-income taxpayers have considerable ability to change the timing, level, and composition of their income.

Simply stated, when the tax rate goes up, their taxable income goes down. And that means it’s not clear whether higher tax rates lead to more revenue or less revenue. This is the underlying principle of the Laffer Curve.For more information, here’s a video from Prager University, narrated by UCLA Professor of Economics Tim Groseclose:

Groseclose does an excellent job, and I particularly like the data showing that the rich paid more to the IRS following Reagan’s tax cuts.

Progress on the Laffer Curve*

The title of this piece has an asterisk because, unfortunately, we’re not talking about progress on the Laffer Curve in the United States.

Instead, we’re discussing today how lawmakers in other nations are beginning to recognize that it’s absurdly inaccurate to predict the revenue impact of changes in tax rates without also trying to measure what happens to taxable income (if you want a short tutorial on the Laffer Curve, click here).

But I’m a firm believer that policies in other nations (for better or worse) are a very persuasive form of real-world evidence. Simply stated, if you’re trying to convince a politician that a certain policy is worth pursuing, you’ll have a much greater chance of success if you can point to tangible examples of how it has been successful.

That’s why I cite Hong Kong and Singapore as examples of why free markets and small government are the best recipe for prosperity. It’s also why I use nations such as New Zealand, Canada, and Estonia when arguing for a lower burden of government spending.

And it’s why I’m quite encouraged that even the squishy Tory-Liberal coalition government in the United Kingdom has begun to acknowledge that the Laffer Curve should be part of the analysis when making major changes in taxation.

UK Laffer CurveI don’t know whether that’s because they learned a lesson from the disastrous failure of Gordon Brown’s class-warfare tax hike, or whether they feel they should do something good to compensate for bad tax policies they’re pursuing in other areas, but I’m not going to quibble when politicians finally begin to move in the right direction.


The Wall Street Journal opines that this is a very worthwhile development.

Chancellor of the Exchequer George Osborne has cut Britain’s corporate tax rate to 22% from 28% since taking office in 2010, with a further cut to 20% due in 2015. On paper, these tax cuts were predicted to “cost” Her Majesty’s Treasury some £7.8 billion a year when fully phased in. But Mr. Osborne asked his department to figure out how much additional revenue would be generated by the higher investment, wages and productivity made possible by leaving that money in private hands.

By the way, I can’t resist a bit of nit-picking at this point. The increases in investment, wages, and productivity all occur because the marginal corporate tax rate is reduced, not because more money is in private hands.

I’m all in favor of leaving more money in private hands, but you get more growth when you change relative prices to make productive behavior more rewarding. And this happens when you reduce the tax code’s penalty on work compared to leisure and when you lower the tax on saving and investment compared to consumption.

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