Richard Reeves has an important essay on the impact of intergenerational mobility. The father’s education may be the key to not only better educational outcomes for the children, but also for their income. He writes
Even if someone does not convert a higher level of education into higher income, they are still better off. They can choose more interesting jobs, even if they are not highly-paid. They have more knowledge of the world and possibly of themselves. Education is a good in its own right, not just as a ticket to a fatter paycheck.
In this context, the importance of education for social justice (or injustice) becomes even greater. Schools are the tool, but if we choose to underfund them, they become something worse: not a tool, but an active barrier.