Why are hotels in Australia expensive on weekends?

The cost of materials and labor is rising. According to a report by the Australian Broadcasting Corporation (ABC) on the 23rd, not only are there more days to charge service fees, but some restaurants have also changed from charging only on Sundays to charging on Saturdays, and the amount of service fees is getting higher and higher. Obviously, the cost of catering for consumers on weekends has increased. However, people in the catering industry also have many difficulties to talk to the media. Some people in the catering industry said that the prices of materials and labor are rising now. In order to retain consumers, the catering industry usually does not dare to raise the menu price directly, and can only charge service fees.