> Wow, this is almost a parody. An able-bodied meth addict and convicted felon was illegally living in a public park for 20 years, littering the land around him and forcing rangers to spend countless time and resources cleaning up the mess he left behind, making regular emergency room visits due to his unhealthy lifestyle costing the city hundreds of thousands of dollars a year, constantly doing illegal drugs while not holding down a job and suspiciously acquiring new supplies for his encampment after every sweep (how much do you want to be he engages in illegal activity), and giving an extremely hard time to caseworkers and HHS staff who already have a busy workload (including leaving/getting kicked out of housing multiple times). That one Golden Gate Park Dweller has probably cost the city millions of dollars over the last few years while consuming valuable time from caseworkers and park rangers who could be helping someone else (they're already overloaded). Not to mention the potential damage to the park's environment caused by his littering. What this guy needs is outpatient mental health treatment, and it's honestly criminal that our country has basically no resources for people with mental illness and shoves them into jail or shelters without treating their underlying problems.
Why do you think that's a fault of UBI, rather than the fault of your hypothetical UBI being insufficient? AFAIK any actual implementation of UBI would be intended to be feasible to have housing on, even if it's not very good housing. With UBI, there's a level of income that people are guaranteed to have without needing any proof, that's the whole concept!