To elaborate on this, there are currently only seven US states that require employers to pay tipped employees full state minimum wage before tips: Alaska, California, Nevada, Oregon, Minnesota, Montana, and Washington. For seventeen states, the state minimum cash wage payment is the same as that required under the federal Fair Labor Standards Act ($2.13/hour).
This is not to justify abstaining from tipping in the seven "full-minimum-wage" states. This is merely to provide some quantitative clarification of "being asked to share with a service worker's employer some of the burden of compensating them".