Equity cannot be achieved unless equity of parents or caregivers can be provided. In other words in cannot work. I live in the Czech Republic where the largest non-white minorities are Roma (gypsies) and Vietnamese. The contrast could not be greater. The Vietnamese come to CZ unable to speak Czech but work hard and send their children to local schools where they invariably excel. At a very early age they are taught to study hard and that ethic is enforced throughout their childhood. The Roma by contrast, start the first grade without command of the ABCs, numbers and other basic taught by most parents to their pre-school children. As a result they are sent to special schools because they cannot manage elementary school cirricula. Most stay at best semi-literate throughout their lives.
I don't doubt that much of the income inequality in the US is for this very reason. In fact, I'm quite sure of it.