Final answer:
A quasi-contract prevents unjust enrichment by imposing obligations as if a real contract exists between parties to ensure fair dealings such as service payments, which are fundamental for strong contractual and property rights essential to economic growth.
Step-by-step explanation:
In a quasi-contract, parties' conduct indicates it would be unfair not to impose a contractual obligation to prevent unjust enrichment. A quasi-contract is a legal concept where, although no actual agreement exists between parties, a judge may impose obligations as if a contract did exist to avoid one party benefiting at the expense of another.
An example often cited is when a skilled surgeon performs surgery on a patient with the expectation of payment. Failure to pay for the services rendered would be akin to theft of property. In this context, the surgeon's services represent the property.