Why does generally touting happen?

Getting tickets to your see your favourite music star, go to a festival or even a musical is very hard these days and often it goes without saying that getting your hands on some tickets will not be easy.
Try to get them on the phone and you will find yourself pressing ‘redial’ until your finger aches, only to get through and find they have sold out. Websites seem to crash or become really slow under massive demand.
So if it’s so hard to get tickets, aren’t touts a good thing?

Touting is only possible because of the huge demand for tickets which means the price of the supply can be pushed up. However it is largely the ticket touts themselves that are pushing the prices up by the very act of touting. By buying a huge number of tickets they make it harder for people to get tickets through the normal means, making it necessary to go to touts.
The cost of tickets also means that they are becoming beyond the price range of ordinary fans who just want to pay normal prices to see their favourite band or attend an event.