Okay, let’s assume it’s 10-1. How many other people, in a perfectly efficient system, would it take to provide a decent quality of life for that caretaker and the 10 elderly people? Growing and transporting food, building and maintaining infrastructure, researching and providing medical care, producing electricity and clean water. Nothing extra.

And how many people to support these people.

Probably more than we’d have available to work.

There’s a reason China started taxing condoms.