It's irrelevant. Even if the authority existed to reclaim all the /8s handed out to private companies (it doesn't) you'd kick the can down the road a few years

It's irrelevant. Even if the authority existed to reclaim all the /8s handed out to private companies (it doesn't) you'd kick the can down the road a few years at best. Then we'd be right back in the same boat. There are only ~4 billion IPv4 addresses. There are more than that many humans alive, most of whom have or will have a smartphone. So we're already short on addresses without considering network equipment, servers, IoT, or anything else.