There are less investors because it's not a growth sector, because America increasingly criminalizes mental illness, so the mentally unwell end up in jail far more often than in mental hospitals.

It could easily be a solution if we switched away from a mass-incarceration, punishment above rehabilitation regime like in Norway as described towards the top of this thread.

Right, so let's torture the mentally ill patients to save a bit of tax money. Seems like the right solution.