Why do you believe there is inadequacy and bias in mental ability testing (the IQ system, as you put it)? Have you read this Citation Classic on the subject?:

http://www.amazon.com/Bias-Mental-Testing-Arthur-Jensen/dp/0...

...Of what? Do you mean something like this?:

http://www.amazon.com/Bias-Mental-Testing-Arthur-Jensen/dp/0...

http://www.amazon.com/Factor-Science-Evolution-Behavior-Inte...