WASHINGTON — At the Internal Revenue Service’s sprawling Kansas City, Mo., processing center, teams of clerks earning $15 per hour work through the night, trying to help the agency clear a backlog of more than 20 million tax returns that are a year overdue.The conditions are subpar: Scanners sputter, forcing workers to enter data by hand, staplers are scarce and piles of tax documents overflow from carts.“The general theme for the time I’ve been there has been chaos,” said Shawn Gunn, a clerk in the receipt and operations group at the I.R.S. who started working at the facility in Kansas City last June and is transitioning to become a tax examiner.What’s happening in Kansas City provides a window in …
