Except the maitre'd isn't the restaurant, and what he's selling technically isn't his to sell. So as such it's more of a black market for stolen goods. If the restaurant had a stated policy where tables where auctioned off at busy times then that would be different.
You don't know whether it is or isn't his decision to make - that would be between him and his employers.
He may very well have the discretion to bend the rules a bit for the right kind of people to keep the place popular - wealthy people who like to buy their way to the front of the line are also people who are likely to spend more extravagantly on the wine.
