Continued welfare benefits based on drug-free status.  Our taxes cannot be used for these homeless people to purchase the use of illegal substance.  Cannot keep subsidizing their illegal lifestyle of substance abuse, no meds management to address mental health issue or no legal address then stop the welfare.  That way mental health issues gets addressed and med management can help them become employable or useful again.  Legal place of residence would allow them to continue receiving welfare and in stable housing. Problem solved.