Answer:
Dependency Ratio
Step-by-step explanation:
The Social Security Trust Fund (SSTF) is expiring fast and hence with this, the problem of maintaining the sustainability of this organization is crucial. The number of workers required to contribute towards the security of at least one retirees/citizen/beneficiary is referred to as dependency ratio. The social structure depends on these workers for all sorts of essential support services by paying taxes and fees to render their service