If nothing were consumed by the labourer but corn, and if the portion which he received, was the very lowest which his sustenance required, there might be some ground for supposing that the quantity paid to the labourer could, under no circumstances, be reduced, but the money wages of labour sometimes do not rise at all, and never rise in proportion to the rise in the money price of corn, because corn, though an important part, is only a part of the consumption of the labourer.