If all the goods produced are thus swallowed up by human consumption, there can clearly be no room to spare in the total social product for such unconsumable means of production as tools and machinery, new materials and buildings, and consequently enlarged reproduction, too, will have to take a peculiar course. What happens--according to this odd conception--is simply that staple foodstuffs for new workers will be produced to the amount of the capitalised part of surplus value instead of the choice delicacies previously provided for the capitalist class. The classical theory of enlarged reproduction does not admit of any variations other than those connected with the production of consumer goods. After our previous observations it is not surprising that Marx could easily dispose of this elementary mistake of both Ricardo and Smith. Just as simple reproduction requires a regulated renewal of the constant capital, the material means of production, quite apart from the production of consumer goods in the necessary quantity for labourer and capitalist, equally so in the case of expanding production must part of the new additional capital be used to enlarge the constant capital, that is to add to the material means of production. Another law, Marx discovered, must also be applied here. The constant capital, continually overlooked by the classical economists, increases relative to the variable capital that is spent on wages. This is merely the capitalist expression of the general effects of increasing labour productivity. With technical progress, human labour is able to set in motion ever larger masses of means of production and to convert them into goods. In capitalist terms, this means a progressive decrease in expenses for living labour, in wages, relative to the expenses for inanimate means of production. Contrary to the assumption of Adam Smith and Ricardo, enlarged reproduction must not only start with the division of the capitalised part of the surplus value into constant and variable capital, but, as the technique of production advances, it is bound to allocate in this division ever increasing portions to the constant, and ever diminishing portions to the variable capital. This continuous qualitative change in the composition of capital is the specific manifestation of the accumulation of capital, that is to say of enlarged reproduction on the basis of capitalism.[98]