The tipping culture is getting out of hand. We all feel compelled to tip when someone does a good job - that should be enough. As for preserving high levels of service, there are all manner of 5 star establishments around the world, for example, in Asia, Africa, Middle East etc, where tipping is not part of the culture and the service is impeccably first class. Obviously for service like that it is a pleasure to tip particularly when you know it is not "compulsory". I suggest you get a copy of Carnival or RCCL´s public accounts and see what they rake in before you back tipping as a measure of quality control and supplemental employee income. You will see that your defence of the tipping culture only ensures the corporates get bigger profits at the expense of the workers.