Perhaps we should stop looking at ATAR's as the only measure of success, especially considering that for anyone who does not seek tertiary education it is essentially meaningless. Instead, they should be better supported by our education system.
That would definitely be a step forward. This is already somewhat supported by VCAL, VET and the new technical schools, and I agree they have a lot of room for improvement. However, I don't think this will solve the problem, for reasons enwiabe has already argued.
Slightly off topic point here, but I find this point very interesting:
Now, there's a very important point which needs to be stressed. Intelligence is a lot broader than that stupid measure called IQ. Intelligence refers to any and all of our mental capabilities, which are much broader than what can be tested on paper - especially not with a rather specific paper like an IQ test (or something like the UMAT, for example). They test specific elements of intelligence, which most certainly do not encompass the entire concept of intelligence. I don't think intelligence could ever be fully and accurately measured. What we can say though, is that we certainly have evidence certain elements of intelligence are genetic.
I don't believe anyone would disagree that ATAR/IQ or any of these specific tests only look at specific aspects in 'intelligence'. However, no matter what metric we choose to measure 'intelligence' (or aspects of intelligence, or a weighted sum of different aspects to represent a total, or anything you can imagine), we would still obtain a ranking of people. This can only lead to two conclusions: 1) there is a 'natural pecking order', or 2) intelligence should not be quantified and people should not be ranked.
While it is nice, I don't think it's right to assume that everyone is good at something.
And if we follow this train of thought, and that assume that like attracts like, then we will naturally arrive at a society where there is a separation by SES, where certain 'intelligence' metrics (ATAR/IQ) would be exaggerated in certain communities.
PS. I use the term 'intelligence' loosely to mean a measure of someone's abilities, and I use the term 'natural pecking order' to loosely mean a rank of people's successes, these successes which are correlated with some measure of 'intelligence'.