> At the same time, the public demands more oversight and constraints on police , which reduces their ability to enforce the law

Don't make excuses for them. If you're legally allowed to kill people on purpose, you (should) get oversight and tight constraints. We don't because of a lot of reasons, but we should

They get paid six figure salaries for not actually doing a whole lot, they can manage.

To what extent? Do you want infinite oversight and little-to-no crimes convicted? What are your expectations on law and order vs criminality? do you believe people naturally police themselves?