Grub, those students at the elite schools are not accessing superior coaches etc, they are accessing superior selectors.
As for the whole elite schools argument, take a look at age level rugby in NZ, where young players from remote schools, and the Polynesian islands are offered huge bribes sorry scholarships to go to the various *Boys High School, but do not end up with a rounded education, and when they do go off the rails after leaving school, are a protected species, looked after by the rugby establishment. (sound familiar) Take a look at the history of Sevu Reece, the latest "wunderkid" of NZ rugby.