Answer:
It's a fundamental economic principle that when supply exceeds demand for a good or service, prices fall. When demand exceeds supply, prices tend to rise. ... However, when demand increases and supply remains the same, the higher demand leads to a higher equilibrium price and vice versa.
Police officers are doing the work given by the government and help the people and protect the people from the thieves and killers
So every government can have a set of rules in their area without having conflict.
I believe it was called Feudalism :) I hope this helps!