Easier approach - make tips completely illegal as tax evasion or tax them higher than the meal, let's say 100% tax on tips.
Treat them as bribes. Punish the one who gives one with fine(1% of income/net wealth) and one who takes with mandatory imprisonment. After that they will quickly go away.
alt Hacker News
Treat them as bribes. Punish the one who gives one with fine(1% of income/net wealth) and one who takes with mandatory imprisonment. After that they will quickly go away.