The article discusses the impact of buyer's tax on consumer and producer surpluses in the housing market. Initially, when there is a decrease in demand and an increase in prices, the consumer surplus reduces while the producer surplus increases. However, with the introduction of a buyer's tax, both consumer and producer surpluses reduce as buyers pay more and sellers receive less. Furthermore, it highlights that an increase in the buyer's tax leads to a further reduction in social welfare and government revenue. The article also suggests measures to stabilize the housing market in Melbourne, including increasing credit standards for homebuyers and regulating the rent of foreclosed properties.