The heart of economic growth is an expanding subsistence fund, or the pool of real savings. This pool, which is composed of final consumer goods, sustains individuals in the various stages of the production process. The increase in the pool of real savings permits the expansion and the enhancement of the infrastructure, and this strengthens economic growth. An increase in economic growth for a given stock of money implies more goods per unit of money. This means that economic growth, all other things being equal increases the purchasing power of money.