There are laws in place for service workers related to minimum wage. The employers have to make up the difference if tips don’t meet the rate for hours worked. It seems to me that’s not sufficient for the times.
Hypothetically, if everyone were to stop tipping in the U.S. would things be better or worse for workers? Would employers start paying workers more?
Employers would ultimately see it as not their mess, not their problem. They already pay the minimum wage they legally can, if they wanred to pay their employees a living wage then they would already be doing so. They know that they will lose their current experienced servers, but they also know that there will always be desperate workers who have no choice but to accept the crumbs that are offered.