[yladiz]

The reason that Japan and the US act differently is not due to tips but due to culture. In the US if there's some kind of issue that person will likely complain but unless it's egregious they probably will return to wherever it happened. In Japan, however, generally one mistake costs the business that customer forever without the customer complaining directly about it. Additionally, remember that it's not the employee's fault that there are tips, it's the employers and the US society that expects it (consider restaurants that removed tips often bring them back) and the employee is just working within that construct.