Most of the third world operates like SF.
The cities have a wealthy class of 1 percent of the population or so—and everybody else lives in dire poverty.
Many of the wealthy like it that way—it reinforces their feelings of superiority.
We are drifting into the Indian (India) caste system—where the wealthy never have to deal with the lowly masses.
Reminds us of the SFBay Area penchant for hiring H1B visa holders from India to replace Americans. Bringing their values to America in exchange for “cheap” labor.