I own a computer; my company buys a computer for me to do work. If the economy consists of mothing but people, companies, and computers, it'll be twice as big as you'd think it'd be.

Then, you need people to manage the computers — but now you need twice the number of people to do that than you think you would.

You need to ship computers, recycle computers, ...

The economy isn't zero-sum: I think the nonpeople economy is only limited by our ability to run companies, and there's no limit ti the wealth of a company? Maybe? I dunno...