"And why should the quality of the school a CHILD goes to be directly related to the amount of money, effort and education of the PARENT???"
In the private education sector, it is a given that the quality of the school a CHILD goes to is directly related to the amount of money, effort and education of the PARENT.
We accept that without a whimper, don't we?
Regarding the admissions systems in other countries, I think one has to be sure one is measuring apples against apples. I believe that many countries have a system very similar to our old style of 11+ for all, pass = success, fail = just that, but that the middle classes do that modern thing of tutoring like crazy, like here! It's impossible to go 'out of catchment', like it was here 30 years ago, thus local schools reflect their communities. Schools in lower socio-economic areas tended to be more vocational as 'all that fancy O level stuff isn't/wasn't for the likes of us', and the leafy areas sport/ed the grammar schools.
The other thing is that we, as the English, don't want our school to be just 'good', it has to be better (than the others), otherwise where's the advantage to our kids? It's my belief that what's changed here from our old, 'local system' to the new is that misunderstood concept of 'preference' as it's miscalled 'choice'. The day that was introduced, the middle classes slipped into their running shoes and sharpened their elbows as they smelled an opportunity at 1000 yards. I bet you'd see all the other allegedly 'much better' systems go the same way if the chance to sway personal advantage was introduced!
Fwiw, outside of London which has its own, weird educational micro-climate, I believe most DCs do still go to their local school.
Finally, could it not be argued that maybe the DCs of those parents who fled, overawed and scared at the merest suggestion of the chance of 'bettering' their kids by even applying for Aske's might actually be better off not there?