Intergenerational Equity:The principle that the current generation should not deplete or degrade the resources needed by future generations, ensuring that they have equal access to the same opportunities and resources.
Sustainability:The ability to meet the needs of the present without compromising the ability of future generations to meet their own needs, often in the context of environmental, economic, and social considerations.
Pay-as-you-go (PAYG) System: A system where current workers' contributions are used to pay for the benefits of current retirees, rather than saving and investing contributions to fund future benefits.