Thereby, the capitalist profits (makes extra money) by selling the surplus value of the labour of the workers; hence is new wealth created through work.
The surplus value is increased first through absolute methods, such as extending the work day, then through relative methods, such as increasing worker productivity.
A valid measurement of total productivity necessitates considering all production inputs, and the surplus value calculation is the only calculation to conform to the requirement.
Furthermore, the measured difference between economic depreciation and actual depreciation charges will either add or lower the magnitude of total surplus value.
