It's an interesting topic with some serious ramifications.
I strongly feel that if you buy your tag, and the state sells you a tag that gives you the right to kill a specific animal. What you do with that tag after the transaction has taken place should be up to you. If you want to give it to your son, daughter, wife, sister, brother, cousin's father-in-law, whatever, fine. If you want to sell it on ebay, transfer it to a client, or throw it away, that should be fine too.
Where problems might appear is when outfitters start buying up tags until none are available to purchase anymore and then sell those tags to clients with the condition that they book a hunt could be a problem.
My opinion is that we take our chances and allow group (party) hunting, and if we end up with a problem, add some regulation.