How do you enforce that? Now you need to have a regulatory agency whose sole purpose is to investigate people, companies attempting to abuse, workaround the system.
But if the price or terms of ownership of something like domain ownership were legally defined using a reference to beneficial owners, that would make ownership the result of fraud (if terms haven't been complied with) and therefore precarious when such owners are discovered later.
The possibility of losing a valuable domain later due to discovery of that breach of terms would create an incentive against that kind of fraud.
If the terms are just to set a higher price, without requiring beneficial owners to be named, potential owners might be willing to simply pay the higher amount without revealing who they actually are, to ensure they don't face the risk of losing the domain on discovery, and that would achieve the original goal of raising the price.
If I want morbidus-rex.com, and I see a cybersquatter there, I can file a complaint. I pay $100.
You also need to give appropriate tools to allow private enforcement. If I file a complaint, the cybersquatter is required to release documents showing corporate ownership all the way up the chain. Failure to do so results in automatic loss.
Registrar arbitrates, with first $1000 in costs going to complainer, and remaining going to registrant. Typical case, I show that I'm an individual or similar entity, and it's done. If there is a complex corporate scheme to decipher, the party with the complex corporate scheme covers costs.
And if you hold a thousand domains like jkhzxkljhdsjkl12jkl.com, I don't really care.