Why do the people who make the most money do the least work?
This is a fallacy of people who align physical labor with the concept of work. The people who do the most work make the most money. Possible exception: People who inherit or win money. They can do little to almost no work and make money by paying others to make them money. However, if they do not pay attention to the people they hire they are at risk of losing everything. So, these people learn to monitor and supervise the people they hire. See first sentence.
Last time people used to said "there is no poor doctor in the world", and medical doctor made the most money. It is not the degree that make you make the most money, it is "you" who make the most money. The most money made by a person is not because of his degree, but because of his ability, his foresight, his courage, and with some of the luck factor.