http://www.halfsigma.com/2006/06/high_iq_does_no.html and http://www.halfsigma.com/2006/07/higher_intellig.html were the posts I checked to confirm the cached belief, and provide significantly more detailed and nuanced claims. The short version is that education, not intelligence, influences wealth; intelligence does seem to give one an edge in getting that education, but certainly an education isn't outside the reach of the average person.

Edit: Just my personal two cents, but having gone through the job searching and raise process a lot, I'd agree that there's very few companies that actually hire/promote based on intelligence/performance. One's ability to look credible and impressive on an interview is far more important, and it's quite easy to do that with a lower IQ. So, while I'd expect that intelligence would correlate with wealth in a perfect spherical society, it makes sense to me why there's a much less significant correlation in our actual, existing society.