The workers did not earn the wealth. The capitalist earned it by exploiting the workers. = The capitalist paid them less than their work was worth so that he, the capitalist, could make a profit. This skill of earning is a speciality, one that workers often do not have in their skill set. A worker should not be rewarded with the earnings of the capitalist for that was the capitalists work and his alone. The worker agreed to be exploited at a reduced wage and should bear the consequences. Or, rise in revolt.