The Wealth of Nations by Part 2 Chapter 4 Page 19

They might be paid with a smaller quantity of money, but that smaller quantity might purchase a greater quantity of goods than a greater had done before. The profits of stock would be diminished both really and in appearance. The whole capital of the country being augmented, the competition between the different capitals of which it was composed would naturally be augmented along with it.

The owners of those particular capitals would be obliged to content themselves with a smaller proportion of the produce of that labour which their respective capitals employed. The interest of money, keeping pace always with the profits of stock, might, in this manner, be greatly diminished, though the value of money, or the quantity of goods which any particular sum could purchase, was greatly augmented.