This statement is absolutely ridiculous. This imbalance has existed for as long as I can remember. The reason that it does is because white families have opted to pay for private tuition rather than send their kids to some of these horrendous public schools. If you take most of the white kids out of a particular school system, what do you have left? Denying these poor black children vouchers is never going to advance this imaginary goal of desegregation.
Sort of like birds deciding to fly off and abandon a snake-infested island.