Earlier quoted context omitted.
Ability does affect socioeconomic status, I’m not disputing that. The question in a school context, though, is whether socioeconomic status for children determines ability. As I stated in my original list, what I observed was that gifted classes were filled with children from high social status backgrounds. They certainly didn’t create the conditions for their socioeconomic status, their inherited it.
What's your point? That if a rich parent teaches their kid to read, the fair solution is for the school to unteach the kid, to level the playing field?
Why should a child suffer simply because they were born into a less supportive family environment?