He didn't explain anything because it's a false statement.  Gold mining does not require permission.  That is, unless you want to get into some asinine argument like Native Americans vs colonists philosophy on land ownership and take the colonist viewpoint to it's maximum extreme that one man can own the entire planet and charge everyone else rent.  This is not how things work though, because there's no such thing as "rule of law".  Force is the only law, and governments are a monopoly on force for a specific area of influence.

The "law" is just a smokescreen put up to try and obfuscate what the system really is.  If one man owns the entire planet, he's a paper millionaire.  He can claim everything on paper, but he can't match the force required to actually have it, unless he's Jim Jones and everyone else on the planet is a cult member.

Saying mining gold requires permission is like saying willful disobedience against tyrants is not allowed.  Something like "sire, thou hast been caught poaching deer on the king's land, thus I sentence you to death".  That is the side Anonymint is taking, but killing all the poachers is an impossible task and the "rule of law" isn't even a real thing.