If they wanted to keep prices lower, the Richard Rogers could try to be the first venue to do paperless ticketing and make it very strict on how that worked, usually linking the tickets to the credit card used to purchase them, and requiring a swipe to print out ticket stubs as you enter the venue, with no other options.
But, currently, New York is the only state that makes that sort of option not a possibility. As the ability to transfer a ticket is codified into law. For U2's current tour, the MSG dates were the only ones where people got a transferrable ticket, which made out shows sell out faster than others, with scalpers making money hand over fist as a result, as we were the only city on the tour where people without tickets could fly in and have any chance of getting in...
Louis CK said the current model is if you want to prevent scalping, you are told you have to keep pricing your tickets higher until it makes it a risky investment for scalpers. And that is the system we have now. He did his previous tour in venues where he could manage his own ticketing and he hired scalpers to find the location of tickets being scalped everywhere online, and e-mailed those customers saying their tickets would only be available at the box office where they would have to immediately enter the venue without being able to hand them off to someone else, or they could also cancel the transaction. Most people canceled them, and he put them back on sale for $45.
But it is dynamic pricing, as soon as Hamilton tickets don't sell at that level, they'll come down in price. And remember, it is impossible to tell how soon that will be, since all of the tickets under that top point are still being bought by scalpers, so there will be a HUGE dip and correction at some point, where people will be able to get in to the show for under face value, as they are currently selling out shows to people speculating this will continue for longer than it actually will...