It's wholly about public - union arithmetic: More members means more union dues means more political power. (studentsfirstny.org)
By failing to offer more advantaged families any benefits, the charter movement then loses their political support, and advantaged families have much more political power than disadvantaged families. (educationnext.org)
This creates more political power and also makes it less likely that individual families or students will be criticized. (citizensforpublicschools.org)