Answer:
Political and social leaders should prioritize effectiveness over virtue. This is so because virtue, although in the vast majority of cases is correct and in accordance with the moral and ethical standards of a society, does not always obtain tangible positive results for citizens or members of a certain group.
Effectiveness, on the other hand, although it is more lax in terms of ethical and moral standards (often disregarding certain values in order to obtain positive results), it obtains better results that positively affect people's lives.