I’ll take a stab at this.
A way I usually like to analyze problems is, no doubt, from the point of view of an entrepreneur. That is we can all sit and around think, “Why is Africa poor?” Well, you guys can go ahead and do this, I prefer to think, “Why don’t I start up business X in Africa?” (solve poverty and get rich! Two birds with one stone!) Where X might be food importation (they seem to certainly have the demand for it) or a textile mill (they seem to have the raw labor for it) or a power plant or etc.. From here, the analysis becomes very simple, either anti-dumping laws, or the various labor movements, or the fact that I would be an idiot for starting up a business in a region in political turmoil. There are areas with a lot less risk and are a much more sound investment.
For this reason, I think the whole IQ thing is really a non-question. Just like machinery can be brought in, foreign experts can also be brought in (to train a cheap workforce no less).