Hang on. I didn’t insult you. I asked what you were familiar with so I could help explain. It’s not a given that everyone on MN understands statistical concepts, especially if they’ve said they have no idea at all what a post means.
Anyway:
People who have a high IQ tend to have higher family incomes than average, and tend to have higher-IQ children than average. Higher-IQ children tend to have better educational outcomes. On average.
That means, all else equal, that we should expect a link between family income and educational attainment.
There will be many, many exceptions to this, of course. Tend to doesn’t mean must, but the pattern is there.
I support policies to help all children succeed to the best of their abilities, and I would expect many poor children to do extremely well, and that is a great thing to be celebrated. I also support policies that help people who don’t have high academic achievement too.
But to want to break the link between family income and educational attainment implies to me a desire to bring that correlation to zero.
I think that would be a very bad idea, as it would imply the state doing things that I think are too much.
For example, it could try to break the link between parental IQ and income (maybe by paying all jobs the same). Or between parental IQ and child IQ (really hard to see how this could be done). Or between IQ and educational attainment (perhaps by reducing the curriculum to the easiest bits only). I would strongly oppose all of those.
That means that the outcome we should expect in a fair world would still have a significant degree of correlation.
But, worse, I think if an expert is starting from the wrong assumption about what a fair outcome would look like, they are likely to come up with policy suggestions that actually do harm. Or that fail to do as much good as they could.