Knowledge raises the possibility you have of making more money, but that is not the only decisive factor. Many wealthy people have made huge money without knowledge, but through cleverness, influent contacts and sometimes cheating. There are many uneducated people being successful as virtual coaches, retail sellers, businessmen, entrepreneurs and also some without much formal education, but that still occupy important and rewarding spots on private and public sectors. So the logic of life works in many different directions and we can't really understand it on its totality.