Piece rate is not to extract surplus value. Everything has two sides. Piece-rate wages have relatively free personal time. You can choose to work in your spare time and spare time. You can choose to rest if you are unwell today. When you are in good health, you can choose to work two hours more every day to make up for the bad rest before. Although people with a fixed salary will not lose money because they do less work, sick leave needs to be approved by the company, and the full attendance of the month will be deducted after the leave. They also go to work at the time arranged by the company. If they are late and leave early, or there is an emergency at home, they can't handle it. They must ask for leave from the company and get approval before they can go. In contrast, piece-rate wages can be paid more in your spare time after you do more. The final choice still depends on what kind of job you are more suitable for. There are also many people who do piecework part-time after their regular jobs, which is equivalent to an extra way to make money.