Let me see if I've got this straight:
1. Indigent, homeless, jobless people with mental health issues exist.
2. They are getting free treatment.
3. The basis of this free treatment is to protect the productive people in society from the indigent, homeless, jobless people with mental health issues.
4. That society decides it does not want to be on the hook perpetually for this indigent, homeless, jobless population with mental health issues.
5. They provide transportation and modest travel expenses to facilitate the indigent, homeless, jobless people with mental health issues to move on if they want to.
6. They do not use force at the barrel of a gun to compel the indigent, homeless, jobless people with mental health issues to leave against their will.
7. Nothing stops these indigent, homeless, jobless people with mental health issues from NOT boarding the Greyhound and instead shuffling aimlessly around all zombie-like in Nevada rather than in California. They just have an added option to go do it in a different State. Heck, it could be a State where people can't shoot back when you shiv them with a pallet splinter, rather than Nevada where more people have guns.
TANSTAAFL. Even for indigent, homeless, jobless people with mental health issues. Unless you're indigent, homeless, jobless with mental health issues in Nevada. Then they'll give you a free lunch AND a free bus pass.
That's charity right there, folks.