Final answer:
Quasi-contracts are created by courts to prevent unjust enrichment when no actual contract exists. They are central to an economy, enforcing agreements like those between a surgeon and patient, ensuring that parties fulfill their obligations or face legal action.
Step-by-step explanation:
A quasi-contract or implied-in-law contract is not an actual contract but a legal substitute, created by the courts to prevent unjust enrichment. Contractual rights play a crucial role in maintaining a stable economy by ensuring that agreements can be enforced. Without enforceable contracts, economic transactions would incur higher risks of non-payment, leading to a decline in business activities and economic growth. An example is the relationship between a surgeon and a patient, where the surgeon performs a service and expects payment. If the patient fails to pay, this breach would be akin to the theft of property, with the services rendered being the property in question. In robust legal systems, the surgeon could pursue legal action to obtain remuneration.