Ok, so the government smashes LiveNation to bits. There's still going to be some contractor that gets paid to handle the ticketing and promoting and dealing with venues and what not. Its not like Taylor Swift alone is the one printing out the tickets, scanning them, managing the online marketplace for resales/transfers of digital tickets, dealing with venue contracts, managing concessions agreements, etc.
Maybe TM/LN are an abusive monopoly in their current position. Maybe they're too integrated in the whole market. Sure sounds like it. But even then Swift isn't getting the full $300 of the ticket cost while the hundreds of other people involved in getting the show together get $0.00.
