entitlement -
A legal obligation on a government to make payments to a person, business, or unit of government that meets the criteria set in law, such as social security in the US.
Wikipedia
An entitlement is a guarantee of access to benefits based on established rights or by legislation. A "right" is itself an entitlement associated with a moral or social principle, such that an "entitlement" is a provision made in accordance with legal framework of a society. Typically, entitlements are laws based on concepts of principle ("rights") which are themselves based in concepts of social equality or enfranchisement.