The U.S. government is making roughly $100 billion in improper payments every year thanks to a combination of fraud, clerical errors and insufficient IRS enforcement, according to testimony at a congressional hearing on Wednesday. “The amounts here are absolutely staggering,” Rep. John Mica, R-Fla., said. The problem of erroneous payments—largely from Medicare and other health care programs—is not a new one. But Mica said at the hearing of a House oversight subcommittee that federal agencies reported over $100 billion in improper payments during each of the last five years. That’s roughly what the Obama administration spent on the Afghanistan war...