People make mistakes when they get tired. Fatigue is a known safety hazard in many industries. One of the reasons for establishing the 40-hour work week was to cut down on the number of fatal workplace accidents. The Fair Labor Standards Act codified this limitation on working hours in 1938 as part of Franklin Roosevelt's New Deal. The FLSA was a step forward for workers, but not every job was included in its protections. Salaried employees and professionals do not qualify for overtime pay and are often expected to work more than 40 hours in a week. In fact, according to a Gallup survey, the average work week for full-time employees is 47 hours. For medical residents, 40 hours is an unusually long shift.