So in your dream society, mentally ill people will be incarcerated for life and charged for it. You think that someone who is so ill that they are a danger to themselves or society is going to be able to pay for 24/7 medical care.
That's delusional. Really even for a person who doesn't like to deal with the real world such as yourself, that is daft.
Are we to assume that these mentally ill people are violent and incapable of survival? Are we also to assume that these menally ill people don't have parents, friends, or other caring individuals (charitable organizations) who would want to take care of them? A similar argument could be made about children.
That's delusional and daft too. I've seen the real world, and much of what I see doesn't impress me when it comes to government intervention programs.
Try to think outside the box, and stop insisting you need society to mollycoddle you so much.