i'm not sure as to the point of attempts to cling to one-to-one mappings for IQ - not least because "IQ" is simply taken as a shorthand for "intelligence" without any real discussion as to what that really means or why IQ sufficiently measures it. Nevertheless, pretending such considerations do not need to be made, there is what would appear to be some general positive correlation between "intelligence" (left undefined

) and income when one looks at intra-country representative populations. If you have significant learning disabilities then you'll be on the lower range of IQ, and relative to someone with an IQ of 130, then sure it's likely there will be a significant discrepancy in income. Equally, someone who demonstrates mathematical aptitude through the IQ test could well be expected to earn a higher wage on average than someone with no mathematical aptitude - again there are plenty of studies which show postive correlation between mathematically related qualifications (A-level, degree) and wage. But beyond such wooly generalisations, the picture is so muddied by socio-economic status, home life, wealth, education, supply and demand job markets, non-monetry considerations etc etc etc. that i do really often wonder why (admittedly a small number of) people still cling to the idea of a magic number to box and classify. It all seems a little inspired by an "Ubermench" mentality - and rarely do you find those intent on the engineering believing they occupy anything other than that top strata....
just my opinions in general on this topic, not aimed at bpesta or anyone in particular