The "externalization" of economic costs is, as I said, a form of argumentation like deconstructionism. It is a form of obfuscation and irrelevant to the discussion. The costs of doing business have always been passed onto the consumers. They have because the consumer pays for everything a business does. No income, no business. By talking about "externalizing" economic costs you are putting the cart before the horse. It is a way to sound intellectual but is actually being pretentious.
So, who’s paying for the consequences of the Berkeley Pit?
Whoever is buying the products of the company that owns the Berkeley Pit.
The state can never straighten the crooked timber of humanity. I'm a conservative because I question authority. Conservative Revolutionary