The growing gap between the richest Americans and everyone else isn't bad just for individuals.

It's hurting the U.S. economy.

So says a majority of more than three dozen economists surveyed last week by The Associated Press. Their concerns tap into a debate that's intensified as middle-class pay has stagnated while wealthier households have thrived.

A key source of the economists' concern: Higher pay and outsize stock market gains are flowing mainly to affluent Americans. Yet, these households spend less of their money than do low- and middle-income consumers who make up most of the population but whose pay is barely rising.

"What you want is a broader spending base," says Scott Brown, chief economist at Raymond James. "You want more people spending money."

Spending by wealthier Americans, given the weight of their dollars, does help drive the economy. But analysts say the economy would be better able to sustain its growth if the riches were more evenly dispersed. For one, a plunge in stock prices typically leads wealthier Americans to cut sharply back on their spending.

"The broader the improvement, the more likely it will be sustained," Michael Niemira, chief economist at the International Council of Shopping Centers, said.

A wide gap in pay limits the ability of poorer and middle-income Americans to improve living standards, the economists say. About 80 percent of stock market wealth is held by the richest 10 percent of Americans. That means the stock market's outsize gains this year have mostly benefited the already affluent.

Income inequality has steadily worsened in recent decades, according to government data and academic studies. The most recent census figures show that the average income for the wealthiest 5 percent of U.S. households, adjusted for inflation, has surged 17 percent in the past 20 years. By contrast, average income for the middle 20 percent of households has risen less than 5 percent.

Pancreas transplant center ... Wyandanch industrial park ... 50 years since Bruce brought Santa to LI Credit: Newsday

Blakeman's bid and Dem races ... Pancreas transplant center ... Wyandanch industrial park ... 50 years since Bruce brought Santa to LI

Pancreas transplant center ... Wyandanch industrial park ... 50 years since Bruce brought Santa to LI Credit: Newsday

Blakeman's bid and Dem races ... Pancreas transplant center ... Wyandanch industrial park ... 50 years since Bruce brought Santa to LI

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