From an economic perspective, there are two basic problems: one is the problem of incentive mechanism, and the other is the problem of coordination. In the final analysis, the system is used to solve these two problems. No matter what method you use, as long as you can solve it, it is a good system. Therefore, there is no standard system in the world. When people ignore these basic problems and simply apply certain concepts, problems will arise.
The fundamental purpose and evaluation criteria of the system is right according to the above paragraph.