Why does the state make it that restaurants don't pay waiters enough? There is no obligation to only pay the minimum wage. Some countries in Europe don't even h

Why does the state make it that restaurants don't pay waiters enough? There is no obligation to only pay the minimum wage. Some countries in Europe don't even have a minimum wage at all and there's still no tipping culture like the USA. It really is just something that's considered normal in the US and bizarre everywhere else.