I don't see what the problem with scalping is. The scalper pays for the ticket, and then provides the very useful service of making the ticket available at the last minute. The scalper also takes on a risk that no one will want the ticket,
I can see that the band/venue/ticketing agency wouldn't like it as they don't get a piece of the action. But that doesn't make it immoral.
If tickets are auctioned online by the ticket seller then presumably the band and venue will make more money which will lead to more tours/albums/better venues etc.
Auctioning would probably work both ways too in that worse seats would be available for less than they currently are now.