Having a special insight of this issue myself from my own experience makes it rather a frustrating fact that this occurs but nevertheless I am not angered by deeming it to be socially 'injustice'

The reason why I say I claim to have a 'special' insight of this is because i've witnessed it in first hand. I've gone from living in a third world country in Nepal to living in one of the most liberal countries in Europe. I've gone from attending top private international British schools in the Netherlands whose pupils were mainly children of 'rocket scientists' working for NASA with 10 bedroom houses in the most luxurious areas of the Hague to attending one of the worst performing schools in Essex within a council estate.

I've befriended nearly everyone from each class spectrum order. I have a keen interest in science especially Psychology, I study it as well only at A-level though. I've always had knack of assessing people by observing them as objectively as possible and I understand this is flawed as evidence as first person is impossible not to be subjective but I've closely observed to assess certain individuals abilities and maturity. And i can say there is little difference between the two, there potential much the same. Ironically through these years of observation had found the council estate kids far more smarter in ways would be deemed mischievous, were far more intuitive and witty but had always been puzzled why they were far more counter-intuitive with paths they have selected. I was learning more about Psychology outside of school and had theorise why this seemed to be the case as it seems rather odd how a bunch of trouble making council estate children could be considered 'smarter' than children from highly educated and wealthy families. It was obvious there was more hardship in the council kid's life, which often meant they required to mature from a young age in order to 'survive' they often encountered in more altercations in which they had to blag themselves out. They were more aware of the world around them with issues such as addiction and government. Whereby the wealth children had a well constructed life, stress-free, well nourished etc...

It is the institution that determines whether these children are nurtured to become successful or not in a professional job. Look at academics for instance - children are assessed on their ability to answer questions to what is assessed through a criteria. If children who have parents who have been educated and have the wealth to send children to the school ofcourse they will get a higher return, the school would be equipped with staff who are as well well-educated and well-paid. There is a higher level of empathy, there can be guided by their parents as they've gone through it as well and understand the nature of it therefore more support is given. These parents and private education institutions are aware what skills and experience they have to equip on these children because they've gone through it.

I've seen in my A-level classmates from those who have the most comfortable lives (own car, money for lunch money etc) who are not even able to answer an intuitive question sufficiently but can achieve A* on the basis that they are able to recite facts stated from the course on the standardised question of exams to lower income students who have to bear the stress to working over time to pay for transport to get into college and buy stationary equipment for revision. Who spend hours on end studying but end up falling to all the pent up stress.

Can you blame these firms? No, as some people have said in this thread they are the safest choice they may not be naturally bright but if you have been developed into being able to write pages and pages of reports which near perfect grammar due to the rigorous and high valued teaching. Who can you blame?