Having an aging workforce means you lose available skills. And aging population means you have more dependents than caretakers for them. An aging population i

Having an aging workforce means you lose available skills. And aging population means you have more dependents than caretakers for them. An aging population in some parts of the world means you have fewer men to fight in a conflict (assuming your adversary doesn’t have an aging population). There’s loss of specialization, loss of skill transfer, younger people do more manual labor like harvesting food. You need people of a certain age range to basically run society.