For a USA-ian, it is interesting to see similar issues for language
immersion (in Canada) and US voucher-based charter schools, each relative
to the local traditional schools, with a tendency for students from
higher-income families to attend immersion (in Canada) or voucher-based
charter schools (in the US), and for traditional schools to retain
students from lower-income families, allophone/ESL students, and a higher
proportion of students with special needs.
While I'm in favor of exploring innovation in education, it seems like there are intrinsic challenges to equity here, and a situation that cries out for methods to equitably balance access to effective education.
[edited to clarify which schools in which country]