Travelers or immigrants from such countries need some time to get used to tipping in America. It can be hard to understand why additional gratuities need to be paid when employees should already be paid by their employers.
Not only do the visitors find this culture bizarre, but they also have a difficult time calculating appropriate amount of tip to be given to the servers. As the cost of a tip also rises along with the cost of the main meal, many people find tipping quite economically burdensome.