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The second arm of this system is using the police on the front line of psychiatric cases.

That actually plays into TFA: the police don't have anywhere to take kids in crisis, so they drop them at the Seattle Childrens Hospital ER.

...and when they are adults, the cops often just shoot them.

The cops should not be placed in this position in the first place. They train for a different job.

Schools as a food-distribution / daycare network.

Libraries for numerous social services.