Well it's not basically about being educated or graduating with the best grades that makes you wealthy, it's about determination, being consistent and also persistent cause success and wealth are not achieved in one day or immediately after graduating. In as much as you have good grades, you must still improve your skills, not only job skills, marketing or management skills but your critical thinking and problem solving skills.
Being educated and having high grades doesn’t guarantee anything, it doesn’t mean you will be wealthy and all, to be wealthy and successful there are lots of qualities one must instill in themselves to achieve this, it takes more than just good grades, it requires lots of hard work, sacrifices, risk and determination to succeed. Building ones business is not easy at all as there are those moments one would experience losses and face some challenges but that shouldn’t weigh us down.
School is essential but most times there are people who are too carried away with their degree or certificate and they are too boost about themselves. When you rely on your certificate you get loosed and keep waiting for white scholar jobs but those who made lower credit or second class can actually rely on their skills. Skills is what keep those that doesn't have a good certificates or those who doesn't go school, that is why you see them putting more efforts to work hard to make sure their skills pays them off than their certificate since they can't use to secure a credible work or what can put food on their table.
You are right, educated people get carried away by their certificate and educational achievements and feel too big to settle for ordinary jobs, they are so fixated on having a white collar job because those are the people who are respected more in the society. They don’t know that there is more opportunity in having a skill and being your own CEO than working for someone, when you work for someone you get used by the person and all the growth of the company is in favor of the person.
Having good grades is good and beneficial but it doesn’t guarantee anything as you will have to struggle just like others to get work especially in my country though you are at a higher advantage than those having lower grades.