How it works in many places is that whites left the afflicted area decades ago and now large sums are spent bussing black kids from black zone A into black zone B so they can fight with the Zone B kids all day long instead of doing anything resembling learning...
Like many government programs busing had unintended negative consequence which were completely ignored:
1) In many areas small elementary children were put on busses as early as 7:00 am, and spend up to an hour traveling to school, in order to ride the bus across town. The children arrived at school tired and unable to learn.
2) Fights, shakedowns and other forms of bullying were frequent occurrences on many buses. Authorities ignored the dangers and would not punish the perpetrators, even when parents complained. Even the adult bus drivers feared the predators.
3) The environmentalist liberals completely ignored the fact that billions of gallons of fossil fuels were being wastefully burned in a government mandated activity that did nothing to improve the education of the children it was supposedly benefiting. No worry at all about carbon emissions and the impact on climate change from this activity.
4) Not only did the educational performance of minority children not improve, the performance of good schools declined. Many parents, fed up with dumbing down of the curriculum, behavioral problems, and violence authorities could not stop removed their children from the unsafe environment and at great financial sacrifice moved their children to private school or home schooled.
Having lived through the era of busing in the south, I observed first hand the deterioration of public education resulting from busing. After five years of trying to educate my child in the public schools I realized the situation was hopeless and paid for private schooling. Her classmates at the private school included the children of some of the most left wing community leaders who did not practice what they preached.
It is interesting that over time liberals have quietly, not publicly, recognized busing failed at its objectives and caused students to suffer. As school systems have slowly abandoned busing, there have been few demands from progressives for its continuation and even fewer lawsuits to compel local systems to continue the practice.
Likely a few liberal cranks in the press will moan about Walker ending busing. However, most liberal taxpayers will stay silent, recognizing it is good policy.