Generally it does predict economic success. We have all been to school and know that the smarter kids generally do better after graduation. Of course there are the exceptions, it's a continuum. We all know examples of exceptionally smart people that have their progress limited by lack of people skills. Then there are those people who may not be exceptional in their raw intellect but have emotional intelligence that drives their success.

An inconvenient truth is if you are on the left side of the bell curve in our modern society, the outlook is poor. Some would argue this also holds true for the middle, as we see baristas with university degrees.

So, I must contradict you, in general, IQ is correlated to economic success. Here a quote for you:

Is IQ a predictor is success?

Answer by Peter S. Magnusson, SVP Cloud Development, Oracle. Formerly Snapchat (VP Eng), Google (Eng Dir), and Virtutech (Founder and CEO), on Quora.

As the question is stated, the answer is simply "yes".