Run it like an airline, where your name is on the ticket and you don't get in unless it matches your ID. Either that or your ID is the ticket. Just bloop that big barcode on the back of your ID with your phone when you buy the admission, then let the guy bloop it again at the door when you go to the show. That would make some scenarios harder, like the trope about your boss handing you two extra tickets she can't use, but there's probably some way to bloop around that without giving the scalpers unfettered bloops.
1/ attending a concert is not a civil right
2/ can't emphasize enough, but _get an ID_. While ID posession was used to discriminate against groups of people, the real problem here is "why doesn't everyone have an ID"?
Is it? In the US, I'm not aware of any way someone can legally drive, be employed, have a bank account, or get a cell phone without having an ID. At the same time, as long as you were registered at birth, getting an ID from scratch is a little bit of legwork and probably less than $100, and that's probably subsidized if you don't have income. The number of people walking around without an ID and no way to get one has to be vanishingly small. I'm sure there's a certain fringe of people who are undocumented, on the run from the law, or otherwise encumbered in their ability to get one, but how far should we bend over to get a ticket fee from those people?
Edit: Dang it, the best answers always come after I close my laptop. "It would be discriminatory if the government didn't provide people a way to get ID. As a business owner, that's beyond the scope of my responsibility. Same as if someone showed up without $5 and wanted to buy a sandwich." ...is another way to look at it.
They're going to pay thousands of homeless people to register for the fan clubs of how many artists? Nevermind the logistics of the hiring, the payment alone eats into the margin.
This gets more complicated as they may go after gig economy workers first. They're a perfect target: the scalper's deal would have better reward/effort ratio than Uber, DoorDash, Deliveroo, et al.; gig workers look "normal" in ways homeless don't, and are desperate for cash to keep them from becoming homeless.
At that point, would scalper's contribution be net positive? Net better than it was? I'm not sure how to answer that.