The poor are exploited
In response to the article “Being poor can impair intelligence,” by Amina Khan:
As a person who has been poor all my life, I would like to point out the one flaw in this study’s findings: necessity is the mother of invention. Poor people are forced to sharpen their power of reasoning in order to survive. As an example, I refer to the auto mechanics of Cuba, who have been called geniuses.
The rich, of course, take advantage of the poor by hiring lawyers and stealing some of these inventions. This situation has lead to revolution, in history, and perhaps it will again.