The WSJ reports that there might be consequences to allegations that congressional stipends were abused.

Congressional rules say the daily travel funds, called a per diem, must be spent on meals, cabs and other travel expenses. But when lawmakers travel, many of their meals and expenses are picked up by other people, such as foreign officials or U.S. ambassadors.

That can leave lawmakers with leftover money. Lawmakers routinely keep the extra funds or spend it on gifts, shopping or to cover their spouses’ travel expenses, according to dozens of current and former lawmakers.