World Cup guests shocked by America's tipping culture

International football fans visiting the U.S. for the World Cup are experiencing severe "tipping fatigue," expressing frustration over a costly culture where tips are expected even for basic tasks like buying a bottle of water.  While tourists argue that ensuring a living wage should be the responsibility of business owners, American hospitality workers are equally frustrated by the influx of travelers who are notoriously bad tippers.  In response, some U.S. bar and restaurant owners have begun mandating upfront service charges to protect their staff's income.