The theory of capitalism and the way of social wealth distribution can only be established in the production relationship of people employing people.
In the ear of the Internet and robots, all the theories of capitalism and the way of social wealth distribution will be unreasonable and unfair.
This is the basic reason why modern people feel that the more developed society is, the harder they are to live.
Because the total wages of workers as a percentage of GDP are getting lower and lower. People can't make money no matter how hard they work.
This is the basic reason of all contradictions in all capitalist countries.