"Since, however, the reduced surplus value is to be distributed among them in like manner, the modification of their respective parts in the production of surplus value must find expression in a modification of the prices"

Rudolf Hiferding's quote is referring to the distribution of surplus value amongst workers. Surplus value is the distinction in between the amount of cash an employee is paid and the quantity of money their labor deserves. Hiferding is recommending that if the surplus value is to be distributed among the workers, then the costs of their particular parts in the production of surplus worth need to be customized. This indicates that the prices of the workers' labor need to be adjusted to show the quantity of surplus worth they are getting. This change of rates is required to guarantee that the employees are receiving a fair share of the surplus worth. By adjusting the rates, the employees will have the ability to receive a bigger part of the surplus value, which will help to increase their wages and improve their total quality of life.