The article discusses how money affects the economy, focusing on Keynes's distinction between real exchange and monetary economies. In a real exchange economy, money is just a tool for trading, while in a monetary economy, money changes how exchanges and production work. The General Theory by Keynes explains why money isn't neutral, highlighting the store of wealth function of money. However, the paper argues that the means of payment function of money is also important. In a monetary economy, having money is necessary to make spending decisions, which affects income levels and composition.