Bilingual sign on door of frozen food aisle, We accept SNAP food stamp cards, Walgreens, Queens, New York. (Photo by: Lindsey Nicholson/UCG/Universal Images Group via Getty Images) UCG/Universal Images Group via Getty Images The richest 1% of households in the United States have accumulated almost 1,000 times more wealth than the poorest 20% over the last three and a half decades, and economic inequality is getting worse at a rapid pace, new research shows.