Hey @mightyblueberry, I personally would not trust a privately run police force in a conventional sense but there are informal neighbourhood watch schemes that work quite well.
Government monopolies are often bad because of lack of accountability. They can do what they like mostly uncontested as real democracy does not exist to question or curb their actions.
It was not planned that @honeybee and I would have posts about monopoly within 24 hours of each other but our line of thinking is very often in sync.
Thank you for your support @mightyblueberry.