https://www.dailymail.co.uk/news/article-6194843/Two-friends-London-East-End-school-different-lives.html
Two friends, involved in an educational experiment where on was sent to Rugby School and the other followed the state system. I will let you read what happened.
Not all lower class pupils can go to public School, but at least decades ago the Grammar school education was available only to be replaced by the Comprehensive system
Equal opportunity is the key, coupled with discipline, hard work and determination, which is the ethics of the Public Schools and was the ethics of the Grammar Schools.
Determination, opportunity and discipline........