Wal-Mart employees may not know this, but the United Food and Commercial Workers International Union, which organized Black Friday’s “strikes” outside their stores, has a serious problem. Its pension funds are failing.

Most are in critical status (defined as less than 65 percent funded) or in endangered status (less than 80 percent funded), according to the union’s own reports to the U.S. Labor Department. Without an infusion of new cash, they will not be able to pay all their obligations to future retirees.