If there is a greater demand for units than supply, price is set by the top N buyers. If you boost everyone&#x27;s spending power above that price without increasing supply, market forces will tend to raise the price until it&#x27;s affordable only to the top N again.<p>In housing, this means that you can boost people&#x27;s spending power to help them afford rent, but you also need to build more units or you&#x27;re just going to fuck everything up.