What about when we don't? What about the ones for whom the meds don't work? What about the ones who didn't know how to get help and were so difficult to live with that their families and friends gave up on them? What about the ones with no resources save the state mental hospital? There's no stigma attached to that, right? We can still befriend and trust and employ folks who are or have been mentally unstable. Sure. We're more likely to hire convicts than people with psychiatric hospitalization in their history.
My opinion, for what it's worth, is that mental health, like racial conflict and sexual orientation and gender discrimination, is much less a personal illness and much more a societal disease. In many cases, its caused by society itself -- the pressure, the expectations, the standard of behavior that's supposed to fit everyone. A hundred years ago, kids who couldn't sit still in class or hated to read or panicked in crowds could become farmers or small town merchants. Now they're labeled ADHD and medicated and forced to conform with the public education rules and models. And later, if sitting at a computer in a room full of people sitting at computers makes one feel overwhelmed and ineffective, they're just weak and need to buck up.
It used to be that "misfits," to generalize, could find alternative lifestyles. One could literally go out in the countryside and camp or build a shack, forage for food, and live in relative isolation, maybe picking up an odd day of work here or there for a commercial luxury like a pair of shoes. But as we urbanize, fence off private land, regulate public land, and make constant claims on every resource from water to air, the "different" among us have narrower options. They have become the street people -- not just the homeless, those who were fitting in but lost home or job or whatever and need a leg up to get back in the game -- but the permanent residents of the street who cannot live any other way.
There are social programs for those who are willing to help themselves. Commit to a job training program and we'll give you temporary shelter. Document your work search efforts and we'll provide government assistance. But if you're "street people," you're not trying, so what's the point of helping you?
Oh my, I have so much energy on this issue, I could write all day and bore you all. So bottom line -- no one "deserves" to be hungry, homeless, left behind. We as a society have created street people. Now we as a society must behave compassionately and help provide for them.