So what you're saying here is not only can you not count, but you can't read either:

Each generation pays to take care of the ever-growing population of non-working elderly who nowadays live longer than ever with more health problems than ever....

There's just no way to handle [declining population] without completely changing the entire economic system to something like UBI, or alternatively we discover some kind of limitless cheap energy.

I literally went so far as to place "UBI" as a solution on the same level as discovering limitless cheap energy. That's literally saying "The only way this is going to work is with fucking magic".

You should learn how to count and how to read before calling people retards and commies.