I personally believe there is no way for them to succeed. If they were acting in good faith the actual incease in the number of intelligent people, who would recognize cruelty when they see it, would tear it down. If they acted in bad faith, which they most definitely would, they would fill the world with these idiots.
IQ measures the likelihood of someone being successful based on an age category. It has little to do with actual critical thinking. In a society that only values IQ it becomes meaningless because its only feeding off itself.