This is one of the depressing aspects of the lives of people now in the USA ,most in Australia are unaware on what's happening over there but if you have the time watch this,after going over and looking at the amount of homeless on the streets,, people working in fast food out-lets going into the car-park and asking in a very angry and dangerous ways why they did not get the 5-10% tip when they don't tip makes one think could it happen here??..
http://www.abc.net.au/foreign/content/2013/s3874510.htm
http://www.abc.net.au/foreign/content/2013/s3874510.htm