That's solved in every industrialized country besides America. It's an issue of political will. I think it's a great thing to work on, and desperately needed in the US, but it's not a question of how to implement it but rather the political change to implement it.
Edit: it's not even, strictly speaking, nation-wide. Idaho for example, does a great job on this. California had most of its mental health facilities shut down during the 1960's when Reagan was Governor to save costs.
Edit: it's not even, strictly speaking, nation-wide. Idaho for example, does a great job on this. California had most of its mental health facilities shut down during the 1960's when Reagan was Governor to save costs.