The difficulty that arises when people in power have the opportunity to use judgement to decide the courses of other peoples' lives is that we regularly see tha

The difficulty that arises when people in power have the opportunity to use judgement to decide the courses of other peoples' lives is that we regularly see that judgement implement their (entirely human, but unjust) biases. Maybe they let the hot girl run a stop sign, but do an "exploratory stop" on the black dude because he "looks sketchy", escalate to a strip search because of a "odor of marijuana" and leave him with his car disassembled on the side of the road when they don't find anything (assuming nobody catches a beating or a bullet over a miscommunication). On the other hand, efforts to constrain that power have a tendency to encode societal biases and injustices in law (see mandatory minimum sentences as a prime example), so it's not at all clear what the right compromise is.