> However even with all this government oversight, lots of regulation, and very large budget, they haven't been able to make a dent in the major problems like homelessness.

All major economies have some problems. There are no binary switches to fix or unfix a problem, especially one as complex as homelessness.

There is one obvious, and effective, fix for homelessness. Provide homes. This would run into a plethora of issues, many political, some social, but it does solve a shit-ton of issues. When the homeless are provided with homes, they tend to have fewer emergency health interventions, fewer police interactions and cost society much less than leaving them homeless. But I cannot see a nation or a state which is still arguing over whether or not healthcare should bankrupt people will go the extra steps to provide the homeless with free accommodation, especially in SF.

Portugal (and other countries) shows that there is a way to solve the problem. However most Americans will reject those solutions because they are not punishing the homeless for being homeless/poor/mentally il/drug users.

Not al all. The average American doesn’t care enough about helping the homeless to accept any of the solutions that have worked for other countries (Portugal for example). In other words, it is the “will of the people” to only solve the problem of homelessness if it can be done with a very limited set of tools (punishment, laws). And those tools won’t solve the problem.