Sunday, June 3, 2018

The “Khaldun Curve”

June 2, 2018 by Dan Mitchell @ International Liberty

I’ve written dozens of columns about the Laffer Curve and its implications.
My favorite may be the one that pointed out why it generally is misguided to raise tax rates even if the government would collect more revenue (i.e., don’t give politicians $1 if it means reducing the private economy by $5).
And I’m always reminding people that the goal is to maximize growth rather than revenue.

I’ve even written about how the Laffer Curve relates to issues as diverse as sex and ISIS.

But I haven’t paid much attention to the history of the issue. Now, thanks to some great research from Nima Sanandaji, we can investigate that topic.
…the Laffer Curve has been used by supporters of low taxes around the world to reinforce their ideas. …it has helped to inspire a downward shift in taxation. Ronald Reagan’s administration introduced massive changes, which dropped the marginal tax rate to 28 percent. …even the proponents of high tax policy are aware of Laffer’s warnings: there is a limit to how high taxes can be raised.
All that’s true.

Reagan’s lower tax rates did produce a windfall of tax revenue from the rich.
And even folks on the left admit that the revenue-maximizing tax rate is below 100 percent, so they acknowledge the Laffer Curve is real.

But what many people don’t know is that the concept of the Laffer Curve existed long before Art drew his famous curve on a napkin.

Nima points to the example of Ibn Khaldun.
…Laffer’s theory was far from new. …Laffer has himself explained that he didn’t invent the curve, but took it from Ibn Khaldun, a 14th-century Muslim, North African philosopher. …Born in 14th-century Tunisia, Khaldun was a prominent scholar and one of the founders of economics and social sciences. Khaldun believed that a just government should only, in accordance with Islamic law, impose low taxes. …However, rulers tend to increase the tax to benefit themselves. High taxes hurt commerce and trade. When tax rates are raised to pay for a bloated government, it will finally cause the tax base to shrink so much that the government cannot meet its obligations. …at this point the state would often implode under its own weight, leading to a period of chaos and the rise of a new state.
Here’s Khaldun’s most famous statement on tax rates and tax revenue.



By the way, there were plenty of people between Khaldun and Laffer who understood why punitive tax rates are foolish, including Alexander Hamilton and John Maynard Keynes(!).

P.S. Perhaps because they’re exposed to the real-world impact, America’s CPAs also understand the Laffer Curve is very real.

P.P.S. Nima has just written a fascinating new book, The Birthplace of Capitalism – The Middle East, which can be ordered here.

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