I did the airline pilot thing for thirty years. I know a little bit about how the pay system works. A pilot`s pay starts when the aircraft is pushed away from the gate, the pay stops when the plane comes to a stop at the gate. All of the other stuff that a pilot may do, such as planning, weather,eating crappy meals at some slop chute on the road, laying over at the old motel 6, whatever, isn`t pay time. It would be like, in the doctor example, when you are actually cutting open a patient, you are working, when the operation stops, the pay stops.