Some Bolsonarists in Brazil believe in funny things about Brazilian universities, like students having sex everywhere, people smooking so much weed that there is green smoke in the air (no kidding, a famous Bolsonarist really said there is green smoke in Brazilian universities), students forcing others to use drugs etc. I believe the hidden sources of the Bolsonarist propaganda tried or are trying to reduce the credibility of universities in Brazil, probably because they see the universities as a threat to the far-right and liberal ideologies (they believe Brazilian universities are full of communists (it’s true that there is some amount of communists in the public universities in Brazil, but they are mostly concentrated in a few courses, while there is almost none of them in most courses primarily unrelated to politics)).
Note that this is about the association between height and income. It is possible that a confuser variable or set of variables is/are influencing both income and height, thus producing the observed correlation between income and height. In this case, the association would not imply causation. But even if this is just association and not causation, its a significant fact, because then there is some unkown set of factors making taller individuals having higher probabilities of earn more.