Statistically, what is the probability that poor students will do well in school? Most poor kids are not intelligent, and care nothing about education. They are not to blame.. More than likely, they grew up in a bad atmosphere by parents who did not care about education, and so quite naturally the children did not find education essential.
And so, the people of low class are stuck in society... Exactly as the way it should be, so that the rest of us can enjoy at least moderate wealth.
Does the term 'Zero-Sum Game' sound familiar? I'm fairly sure that education doesn't qualify.
And I think you're mixing the ideas of intelligence (or the lack thereof) and willful ignorance together. Intelligence is the ability to comprehend things; last I checked, it's not limited to only one social group or structure. However, some social microcultures do not prize intelligence, leading to a condition of willful ignorance: Those who posess intelligence attempt to hide it, and actually act less intelligent than they are, in order to fit into their surroundings. And after a while, this habit of willful ignorance becoems ingrained enough that it not only obscures but actually mars the individual's intelligence. Intelligence is a gift, but also a talent; it has to be honed or it will decay.