First off, I must say that Education is very good and i don't dispute the fact that it's very vital and necessary for human development, it can put you in a position to be successful no doubt but being a graduate is not a 100% guarantee for one to be very wealthy, one can be very sound academically but lack some basic skills of acquiring wealth. Also one can still have some good knowledge of certain skills but if there's no zeal or self confidence in earning a living through it then your education on those skills can be said to be a waste since you ain't making effort to earn from it.
Also I've heard several people complain about having good grades, being 1st class graduates but find it difficult to secure good paying jobs, imagine someone struggling to achieve good grades in the university but find it difficult to earn a living and at the end settle for minor jobs while there are many dropouts with good skillsets as well as being creative and think outside the box, and are bosses of big organisations and companies.
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 a graduate is not the key to being wealthy but so it is not a key to be uneducated. You just have to be smart, you need to improve your social skills, improve your charisma, confidence, improve your visual, be healthy and in a good shape and most importantly, you have to dedicate yourself to particular job, master it and become one of the greatest of all time (I know I went too far).
To my mind, the problem we have is that many people go into universities to be able to get a basic office job and they don't understand that competition is very high and there are many people who are willing to study more, work more and work for less salary. I think that today there are many overeducated people and there isn't enough demand on them, except informational technologies and medicine. There is a big demand on trades jobs, for example, plumbers and electricians are on high demand but people rarely choose these professions while they make much more than people with masters and PHD degrees.