A friend of mine in school had a similar thought - make body cams so cheap that everyone has one. Watch the watchmen.
I’ve considered making this a commercial reality, but we’ve seen that ubiquitous cameras don’t necessarily stop cops or authoritarians from kneeling on your neck, if they don’t feel shame.
I specifically have considered this in terms of protecting workers from (otherwise private or hidden) workplace abuse.
Facial recognition databases of public sector employees will be the straw that breaks this camel's back.