" But even if we assume that all who are directly forced out of employment by machinery, as well as all of the rising generation who were waiting for a chance of employment in the same branch of industry, do actually find some new employment—are we to believe that this new employment will pay as high wages as did the one they have lost? If it did, it would be in contradiction to all the laws of political economy. We have seen how modern industry always tends to the substitution of the simpler and more subordinate employments for the higher and more complex ones. How, then, could a mass of workers thrown out of one branch of industry by machinery find refuge in another branch, unless they were to be paid more poorly? "

― Karl Marx , Wage-Labour and Capital/Value, Price and Profit