The blue city of San Franscisco is in trouble because:
San Francisco has the smallest share of small-fry of any major U.S. city. Just 14.5 percent of the city's population is 18 and under.
Also:
Another reason San Francisco's children are disappearing: Family housing in the city is especially scarce and expensive. A two-bedroom, 1,000-square-foot starter home is considered a bargain at $760,000.
Nothing like land-use restrictions,unions,and environmental regulations to limit the supply of housing and wipe out the middle class.
Las Vegas Sun.