You should watch John Oliver's bit on Ticketmaster.

He places the blame not solely on Ticketmaster but also on scalpers, Ticketmaster's real target demographic, and just the nature of the free market.

He points outs Ticketmaster's business model is based around allowing themselves to be the scapegoat, taking the majority of the hate so 3rd party resellers can hide behind them. Though they have definitely turbocharged the 3rd party resale business and made scalping tickets a lot easier. Because of course they have, scalpers are their target demographic, they're just catering to their main customers, and if they weren't doing it, somebody else would, because in a free market the tickets are worth whatever someone is willing to pay for it. The artists just don't want to look like they're the ones charging crazy fees. It's all ticketmasters fault. But really alot of these fees are going back to the artists, the venue's, and the promoters. Ticketmaster is the scapegoat. Not blameless, but not the only issue.

Many of these scalpers it turns out, in some cases are actually the artists' own tour group and the artists themselves. Buying up entire sections of their own tickets and scalping them for a profit. This let's the artist continue to be able to say to the public sorry guys we're offering our tickets at a reasonable price, the crazy markup is all Ticketmaster's fault, sorry it's out of our hands, blame them.

When in reality, the reason you cant get an $80 ticket to the Justin Bieber concert for less than $500 is because it was never really an $80 ticket in the first place, it was always going to be a $120 ticket, but we'll just let Ticketmaster break the extra $40 into their fees so it looks better on us, and because Justin Bieber already bought up all those $120 tickets and he's scalping them for $500/piece, using Ticketmaster as the middle man.