—Were there any tests to test for “qualifications” or is that forbidden?—
Exactly. That is why it has to be done on a case by case basis. Conversely, The MAIN reason we have more black males in prison is that black males commit more crime. In some cases it was based on discrimination, but that must be determined on a case by case basis. We don’t just let them all out.
I have an even better idea. It would take a generation or two to implement it, though. Why doesn't the government just mandate that people with IQs of 130 or higher be required to marry people with IQs of 80 or lower. That would have the effect of lowering the mentality of the nation in general and guarantee a more docile nation. The spawn of this plan would be far more receptive to receiving sustenance from the central government and would be devoid of the troublesome habit of thinking for themselves.