It's a heavily finable offensive to sell tickets, and they are non transferable (they have your name on them, and you have to show up with ID).
The tickets have all been sold, but not used, if the re-sale of tickets was allowed this wouldn't have been an issue.
Plenty of people got tickets for events they have no interest in, through competitions, business links and various give-aways, + the hundred thousand foreign tickets.
They couldn't sell them, so they just end up in the bin.
But no no no, couldn't have people sell them could we, because we are so paranoid of "the rich" sucking up the tickets.
Much better that no one has them, or they go to people that don't want them, than they go to rich people!