I'm probably missing something but yeah I'm assuming it is to some degree. I don't understand how it would work unless we increase the retirement age (indefinit

I'm probably missing something but yeah I'm assuming it is to some degree. I don't understand how it would work unless we increase the retirement age (indefinitely) or remove old folks from the pool. At this point I'm wondering WHAT IS a sustainable policy? Is there a country this all doesn't apply to that has figured things out somehow?