*Disclaimer: I have not researched this.
My impression, as a lay person, and simply going off of what I have heard, is that back in the 1970's or so, Geraldo Rivera did an expose on a psychiatric hospital, I think in NY or NJ, and uncovered a "snake pit", a psychiatric hospital that simply drugged and restrained the patients, and left them in their excrement for hours, basically, inhuman, unprofessional treatment. This expose got a lot of publicity, and began a movement to shut down psychiatric facilities nationwide. Then the thinking was that most mental patients could be treated with pharmaceuticals in an out-patient manner. So now we have mental patients out here in the wild with us, talking to the air, (you might imagine they are using a Bluetooth, but on closer examination, no earpiece) and other strange and bizarre behavior. Paired with the drunks and drug abusers, we have a real mess of humanity in the streets, everywhere. Couple that with the medical crisis, and you have a recipe for disaster when these patients can't get their meds and no supervision to make sure they take them.