As a starting point, let's try: "None. Ideas such as 'utilitarianism' only serve to justify actions after the fact, and the actual reasons for these actions are more along the lines of personal gain. People in positions of power who espouse utlitarianism as an ethical theory do so to demonstrate their chosen political affiliation."
Are there reasons to believe anything different?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.