San Francisco has long been feared to be falling into a doom loop, a situation where taxpayers leaving the crime-ridden city results in lower tax revenues leading to cuts in services and rising taxes, making it even less desirable to live in. It can be especially devastating when a community's essential businesses, such as grocery stores, decide to leave. San Francisco experienced this last year when Amazon.com Inc. (NASDAQ:AMZN)-owned Whole Foods Market Inc. shut down its flagship store in the city after being open for just over a year, citing employee safety concerns.