In San Francisco, many long-time residents believe the influx of richly compensated workers at Google and other big technology companies such as Facebook Inc and Twitter Inc has pushed rents to unaffordable levels in neighborhoods that once were homes to the working class. Technology companies have grown more aware of the tensions. They recently reached an agreement with the city of San Francisco governing the use of municipal bus stops. Google recently began to experiment with a privately chartered boat that can transport some of its employees living in San Francisco to its offices. And Google may be taking extra...