Comment: It's partly

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In reply to comment: If police would just stick to (see in situ)

It's partly

because they advocate for their own funding. If they can expand their role, they can advocate for more money and resources. When their role expands, so does their advocacy. It's hard to oppose this cycle without being viewed as soft on crime. Further, it's just as unlikely that police will advocate for less resources from within and shift focus back to their harder and more dangerous tasks. They'd rather keep on writing tickets for turn signals and conduct public relation campaigns to raise awareness about drunk driving.