Guns and drugs and jewelry and cars. Stolen for different reasons. It is impossible to say everyone creates the same amount of value for the same amount of time worked on a thing. Person 1 makes 100 wodgets an hour. Person 2 makes 50nwidfets and hour under the same circumstances. You will demotivate the 100 widget person to only make 50 if both get the same amount of things for their time and effort.