Is there some irony that the highest paid on the list is an Air Traffic Controller and the lowest a Commercial Pilot?
Keep in mind that a "Commercial Pilot" is very broad. And if you use the FAA rating designation, the airline pilots are excluded since they are ATP rated.
A Commercial pilot can include a crop duster, flight instructor, aerial photographer, skydive plane pilot, sightseeing pilot, corporate pilot, etc. I'm commercially rated, and therefore a commercial pilot and am allowed to exercise those priveleges. But I have a non-aviation day job and flight instruct on the side. If I were to count only my flying income, I would fall far, far, far below the #25 spot. 🙂
Considering all the major airlines require a 4 year degree, I don't think this list is really applicable.