In a baffling twist of logic, the intense IRS focus on Humphreys County is actually because so many of its taxpayers are poor. More than half of the county’s taxpayers claim the earned income tax credit, a program designed to help boost low-income workers out of poverty. As we reported last year, the IRS audits EITC recipients at higher rates than all but the richest Americans, a response to pressure from congressional Republicans to root out incorrect payments of the credit.

The study estimates that Humphreys, with a median annual household income of just $26,000, is audited at a rate 51 percent higher than Loudoun County, Virginia, which boasts a median income of $130,000, the highest in the country…

The five counties with the highest audit rates are all predominantly African American, rural counties in the Deep South. The audit rate is also very high in South Texas’ largely Hispanic counties and in counties with Native American reservations, such as in South Dakota. Primarily poor, white counties, such as those in eastern Kentucky in Appalachia, also have elevated audit rates.