I wrote a short list of things with full explanations but decided maybe this isn't an appropriate place to go off.Would you elaborate on actual solutions that are unpalatable?
I'll make it short:
Open the insane asylums, force treatment.
Round them up, put them in camps. (End homelessness with this ONE SIMPLE TRICK!)
Completely redesign our system of schools and prisons. Prison is for forcibly altering human behavior, not warehousing assholes. There should be lots of types of school, not a one-size-fits-all Prussian-style prison where we cram all the kids regardless of their learning and social style.
Unleash the police. Alter Constitution to unjam the legal system (currently not possible to have a "speedy" trial).
Freedom is downstream from order and social cohesion.
Men must be governed.
I'll elaborate somewhere else if you want.