But if you create charter schools and DON'T allow them to choose their students (but let students choose them - the MN system), and you DON'T fund them over and

But if you create charter schools and DON'T allow them to choose their students (but let students choose them - the MN system), and you DON'T fund them over and above the mainstream schools (the MN system)... well, then your "social injustice" argument comes up kind of thin. The schools can't select, and the schools don't get extra resources, so any bias is entirely due to the will of parents/students to pursue alternatives, and the extra flexibility of the charters. What this DOES result in is at best marginal increases in test scores, but significantly happier parents, students, and teachers.