In a broad context, a financial transaction involves either an article being sold or a service being rendered. The Supreme Court ruled that; as far as a Dentist is supplying a denture (made by someone else) to a patient is concerned, the transaction is a sale rather than a contract of letting and hiring of services. This legal precedent in common law is called the Tulloch rule. The Dentist (retailer) is a go-between, selling an article manufactured by another profession (manufacturer) to a third party (consumer). It is a well-established economic principle that the consumer price increases in relation to the length of the chain of supply. Milton Friedman, the noted American economist and Nobel Prize winner, argues convincingly that restrictive measures reduce both the quality and quantity of health services. Restrictive practices, legislative or de facto, that provide control of the supply of prosthetic services artificially inflates the price of this basic essential Health commodity.