Why Is Wex (WEX) Up 27.8% Since Last Earnings Report? Yahoo FinanceWhy Is Wex (WEX) Up 27.8% Since Last Earnings Report? Yahoo Finance
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I often warn against countries running up excessively large public debts. Some people interpret my worry as a prediction of a future financial crisis, perhaps including default and/or very high inflation. They point out that countries such as Japan have run large deficits for many decades, with interest rates on long-term bonds remaining near zero. So are these worries overblown?
For developed countries with their own currency my actual fear is not outright default, or even hyperinflation. Rather I fear that an excessively large public debt will eventually force painful changes in fiscal policy, such as benefit cuts or more likely large tax increases. The most efficient fiscal policy is one that smooths tax rates over time, as high taxes are a drag on the economy. Furthermore, the effect of tax increases is not linear. A doubling of the tax rate will lead to a roughly fourfold increase in the deadweight loss, without even doubling tax revenue.
By the mid-1990s, Japan’s budget deficits were on an unsustainable path while the US budget deficits were still on a more sustainable path. At this time, Japan had a 3% national sales tax whereas the US had no national sales tax. Both countries had overall tax burdens that were below average for developed countries.
In 1997, Japan raised its national sales tax to 5%. In 2014 they raised the tax to 8%. In 2019 they raised the tax to 10%. These increases were intended to address the debt problem. Meanwhile the US continued to have no national sales tax. Thus the very thing I was worried about did actually occur in Japan. Furthermore, more tax increases are almost certainly on the way. Unfortunately, the US budget deficit situation also became unsustainable during the late 2010s, due to a highly expansionary fiscal policy. Thus the US is likely to be forced to raise taxes (or cut benefits) in future years.
To summarize, it is true that Japan is likely to be able to avoid default on their public debt. But this does not mean that those who warned the deficits were unsustainable were wrong. Indeed, Japan was forced to repeatedly raise taxes precisely because the path of the public debt was unsustainable without future tax increases.
PS. The FRED data site shows net debt for Japan (blue line) and gross debt for the US (both as shares of GDP.) So the actual gap is even larger than it appears:
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