A simple principle applies to earning higher income. The more you know, the more money you will make. This principle has been true for thousands of years and still holds true today. In fact, the more you learn, the more money you'll make. This is especially true in finance. If you have a Master's in financial management, for example, you will be able to earn more than someone who has a degree from aerospace engineering.
You will learn more the more you are educated.
An iconic rock star once said "the more that you learn the more you get." He was referring specifically to the business world where knowledge is crucial to success. Similar to the business world, the more knowledge you have about a field, the better your chances of making a living. Hence, it is important to remain in school and further your education.