I think all students have an expectation that their school will allocate funds on an equitable basis.  If a student arrives at a school 'exceeding expectations' , the school needs to meet those expectations with the same rigor they apply to a student who needs remediation in a subject or subjects.  When students are in schools where many or most of the students fall within one or the other group, the curriculum should look different.  The problem seems to be needs seem to cluster by demographics beyond the school walls.

Were a school with 50% of its students reading below their grade were to ignore that and instead of hiring tutors offered a curriculum heavy on AP classes, they would not be spending money wisely.  Nor would a school with 50% of its students reading above grade level not offer them, be serving their population.

No set curriculum meets the needs of every school.  To call them unequal based on the kinds/number of classes, makes little sense, but for politics.