Income inequality

It is significant, and now we can measure how bad it is. This is from an article by Robert Frank in the NYTimes.

During the three decades after World War II, for example, incomes in the United States rose rapidly and at about the same rate — almost 3 percent a year — for people at all income levels. America had an economically vibrant middle class. Roads and bridges were well maintained, and impressive new infrastructure was being built. People were optimistic.

By contrast, during the last three decades the economy has grown much more slowly, and our infrastructure has fallen into grave disrepair. Most troubling, all significant income growth has been concentrated at the top of the scale. The share of total income going to the top 1 percent of earners, which stood at 8.9 percent in 1976, rose to 23.5 percent by 2007, but during the same period, the average inflation-adjusted hourly wage declined by more than 7 percent. …

[Does income inequality matter? Yes it does] The counties where income inequality grew fastest also showed the biggest increases in symptoms of financial distress.

For example, even after controlling for other factors, these counties had the largest increases in bankruptcy filings.

Divorce rates are another reliable indicator of financial distress, as marriage counselors report that a high proportion of couples they see are experiencing significant financial problems. The counties with the biggest increases in inequality also reported the largest increases in divorce rates.

Another footprint of financial distress is long commute times, because families who are short on cash often try to make ends meet by moving to where housing is cheaper — in many cases, farther from work. The counties where long commute times had grown the most were again those with the largest increases in inequality.

The middle-class squeeze has also reduced voters’ willingness to support even basic public services. Rich and poor alike endure crumbling roads, weak bridges, an unreliable rail system, and cargo containers that enter our ports without scrutiny. And many Americans live in the shadow of poorly maintained dams that could collapse at any moment. …

But are there offsetting benefits?

There is no persuasive evidence that greater inequality bolsters economic growth or enhances anyone’s well-being. Yes, the rich can now buy bigger mansions and host more expensive parties. But this appears to have made them no happier. And in our winner-take-all economy, one effect of the growing inequality has been to lure our most talented graduates to the largely unproductive chase for financial bonanzas on Wall Street.

In short, the economist’s cost-benefit approach — itself long an important arrow in the moral philosopher’s quiver — has much to say about the effects of rising inequality. We need not reach agreement on all philosophical principles of fairness to recognize that it has imposed considerable harm across the income scale without generating significant offsetting benefits.