Europe solved this problem ages ago with pay toilets and regular police patrol. Some even clean themselves which has an added benefit of dissuading long term residents. The problem has been solved but city's avoid this because NIMBY's will say it incentives drugs, sex, homelessness, etc.
Citizens do not trust that the government will maintain and police them properly, and I think the homeless and sanitary situation in San Francisco is a perfect example.
Citizens do not trust that the government will maintain and police them properly, and I think the homeless and sanitary situation in San Francisco is a perfect example.