I simply do not believe this Martin.
Then we differ quite emphatically. Even if the old boy network still exists after private education is abolished, it will be weakened. Those schools who get the top university places, will , if they must admit children from non-wealthy backgrounds, be getting
those children into top universities. The money wil always find a way to get into the top schools unless there is a movement, from government, to redress that balance. That means extra funding for schools in deprived areas - something I would advocate.
I'm an idealist taking about ideals. But the only reason that ideals can't become policy, is that people deny that possibility.