If measured, I'm quite sure that my DH's IQ would be pretty high, and certainly far higher than mine. I doubt I would fare well in an IQ test. Yet my husband thinks I'm a flipping genius, because I have a way of problem solving and thinking creatively that doesn't occur to him, and I spend alot of time thinking deeply and philosophically about 'things'
I also have high levels of emotional intelligence, and good instinct.
Wheareas, DH doesn't think deeply about much really - but he does a complicated and stressful 'niche' job in Banking which I couldn't even begin to understand, or focus on, and nor could most people. If I worked in that environment I would probably never get beyond a modest clerical level. The biggest factor in his having the job he has, is tenacity and commitment, discipline, and ability to deal with pressure. Intelligence has been just a part of it.
Our children are all of different levels of intelligence I think, and they each have their own strengths and weaknesses. What they do all have in common, though, are strong inter-personal skills, good communication skills, good manners, and high levels of conscientiousness - because it's been drummed into them since birth. they all have a very good understanding of how they need to behave going forward if they want to stand a chance of getting on in life.
We have high hopes for them, but don't have unrealistically high expectations. But they know that they are responsible for their own financial destiny, even if that means being fairly poor, they are expected to be self-sufficiently poor. (where they end up remains to be seen, but statistically as white MC males, they already have the advantage.)
We are affluent, but not affluent enough to support/subsidise three adult children for years. And even if we could, there is no way I'd let them know that might be an option -that would be very disadvantageous, as far as I'm concerned. There is nothing like really needing some money to make you want to get out of bed in the morning, and go looking for a job.
And yet young men from a background of long-established wealth statistically seem to do best of all in the top careers, though they clearly have little need to make great fortunes. Yes, they have educational and social advantage, but they also have much greater expectation put upon them to not let the side down, to maintain their elite position, and a much higher benchmark to aspire to, when all their peers go on to be successful. Settling for humble obscurity is a train driver or whatever, is not something many of them would ever contemplate.
I really do think that even for the many WC or disadvantaged children who have drive and intelligence and ambition, many of them will not achieve their full potential in the workplace because they are just too 'rough' around the edges. They haven't been taught how to win friends and influence people.
We joke disparagingly about the social elite and 'charm school' but there is a great deal to be said for charm when it comes to getting on in the workplace. People may have a certain amount of innate charm, but if they behave and speak in ways which are considered uncouth, if they have a very poor and limited vocabularly so clarity of self-expression is limited, and they have no idea about basic social or business etiquette, they will not be a terribly attractive employment prospect, even if their IQ is high - who ever gets far enough to bother to find out? And those things are all undeniably factors of their upbringing.
The other thing is - what is it we are actually trying to achieve here? There seems to be an obsession with getting people from disavantaged backgrounds into 'top' jobs. What is meant by 'top' jobs, exactly? I don't give a stuff what percentage of very poor people are transformed into doctors or lawyers or CEOs. I'm more concerned with getting the majority of them to a place in life where they can read and write adequately, and can get (and hold down) any job.
If they start by doing moderately well, then their children stand a chance of doing better than moderately well. And their children will do even better than that.
Plucking the brightest 2% of very poor kids from obscurity, showering them with 'help' to achieve, and then and putting them on a pedestal as a shining example of social mobility is not much use to the other 98%, some of whom will be illiterate and completely dysfunctional, is it?