IQ is by no means a measure of talent and neither is wealth.
It is quite common in business and in science to use as measure things that are easy to measure. IQ accounts only for a little set of human abilities that are particularly easy to measure and that is where the trap lies.
One of the classics of the last decades, the book Emotional Intelligence by D. Goleman, shows that success in life and happiness are related to a wide variety of personal, interpersonal and social skills much more than with the IQ. We are simply measuring the wrong things.
This brings also another possibility: people with high IQ are not necessarily attracted to accumulate wealth, but find other ways of being happier in life.
Not sure that high IQ necessarily plays that big of a factor into the overall "chances" of becoming very wealthy. And IQ certainly has little to do with specific talents; as a person can be a virtuoso on the guitar but have perhaps only a normal (100-110) IQ, or even under.
There's also which type of IQ test we're talking about; one that measures crystallized intelligence, or one that measures fluid intelligence.
Some people may rate extremely high on a test which measures fluid intelligence, which deals more with problem solving and logic, but fail miserably on crystallized tests which deal more directly with vocabulary, mathematics, and so on.
I would agree Emotional Intelligence plays a HUGE role in ones over all chance at simply being sucessful- as people with high emotional IQ's have a much greater ability to relate, influence, motivate, and attract other people.
A sign of high Emotional IQ is how much time and effort and thought one puts into "crafting" their own image. People with high Emotional IQs; they worry very little about these types of things- and simply "are who they are". They have high levels of confidence of being themselves.
A sign of low Emotional IQ would be a person who carefully crafts online social profiles, is highly selective over how they appear to other people, spends too much time trying to appear a certain way. Basically high levels of insecurity.
Emotional IQ I'd say plays a larger role than most would think in terms of a person being able to "position" themselves where they can achieve their best.