Likely there is a flag on her profile in the computer, that tells the agents, “ Give the batch whatever she wants, no matter the cost.”, based on previous dealings with her.
If she was on my flight I would have told her to go sit back there in #11 (at least it’s not in the back of the plane) since she’s supposed to be a servant of the people. A voucher is only good for Untied Airlines and who’d want to fly with them after what they did.