The rest of the country may be waiting for the U.S. Supreme Court to decide the fate of President Barack Obama’s health-care law, but the Internal Revenue Service is wasting no time. It wants to add new agents to hunt down tax cheats and still plans to spend $303.5 million building a system to oversee the effects of the health law even though its future is unclear. As for the new IRS workers, the Government Accountability Office said the total will be about 4,500, with nearly 4,000 (3,997) slated for enforcement. On the $303.5 million for health care, the GAO...