a corrupt government would twist its policies and official IQ-testing agency to actually reward, for example, reproduction among people who vote for [whatever the majority party currently is].

Absolutely. It would start with: "Everyone (accepted as an expert by our party) agrees that the classical IQ tests developed by psychometric methods are too simple and they don't cover the whole spectrum of human intelligence. Luckily, here is a new improved test developed by our best experts that includes the less mathematical aspects of intelligence, such as having a correct attitude towards insert political topic. Recognizing the superiority of this test to the classical tests already gives you five points!"