The problem with calling it a ponzi scheme is that this would apply in all contexts, even in very basic economies without money. If you have a tribe of hunter gathers and suddenly they have a sharp decrease in their birth rate, they too would have a hard time taking care of their elderly/children.
That falls back to “ponzi schemes aren’t sustainable”
It’s broken.
The problem with calling it a ponzi scheme is that this would apply in all contexts, even in very basic economies without money. If you have a tribe of hunter gathers and suddenly they have a sharp decrease in their birth rate, they too would have a hard time taking care of their elderly/children.