I do apologise - I don't know why this thread has really niggled me. - Quite possibly the inference of state pupils being inferior and all parents naturally aspiring to private education. The Government should be taking advise from State sector heads and teachers to listen and confront the issues under performing schools/pupils face.
Not everyone chooses private schooling to gain A* and Oxbridge and as another poster has said the high performing state schools are equally high performing and there are plenty of non academic indies. Its about having a choice and a best fit scenario when deciding to opt for a fee paying school.
State and Independent should not "grow together" they should both offer a high standard of education that equips pupils to function as adults to the best of their ability.
My un-educated opinion is teacher training and qualifications should become more specialized and in line with a 2014 society not a 1960's. Salaries reworked accordingly.
Primary school Math - Only taught by a Math graduate/teacher
Primary school English by and English Graduate/teacher
Primary Science by a Science teacher/graduate
General primary school teachers to cover Art /humanities/PE
remove the rubbishy/unnecessary parts of the curriculum and focus on the core subjects through to Y5 at Y6 introduce separate sciences.
Schools to run the school in a way that best fits the pupils it is educating and enabled financially to have specialist teachers as needed in order to ensure those at danger of not grasping the core subjects early on( for whatever reason) are supported . These would be more highly trained/specialized teachers not just support staff.
below average children at non selective Indies generally fare better because of pastoral/1-1 tuition.
Areas of specialized teaching at all state schools to command a higher salary scale i.e.. teachers who maybe specialize in Inner city teaching.
Secondary schools to have dedicated full time Tertiary education advisors/trained admissions officer to help with University or college applications/interviews.
Again apologies for this long rant but the overall divide you identify IMO isn't where you think it is.