Despite the existence of research data that might inform policy about development, political rarely discuss such data in thier speeches why do you think

Research studies are made because they want to solve problems that are occurring in the society. The benefits of research would eventually benefit the politics, especially because they have the power to implement these solutions to the problems. They don't usually delve into research because it is too technical. It is not their area of expertise. Questions may come up that they can't answer.