Where the tip to a waiter is considered as an insult?

In some cultures, particularly in parts of Asia, tipping a waiter can be seen as an insult because it implies that the service staff are not adequately compensated by their employers or that they need charity. In these societies, good service is often viewed as a standard expectation, and offering a tip may suggest that the waiter is inferior or unworthy of their position. Additionally, in countries like Japan, gratuities can be perceived as undermining the professionalism and pride of service workers.