One person is willing to take $10,000? Great. Every other passenger is willing to refuse $9999 for the low price of $9999. Now, each passenger needs a 1/Nth of the payout, and that fraction needs to be >$10,000.
Now the negotiation's starting offer becomes: "You overbooked by one seat. How much will it cost you to ground the plane, or fly it empty and bump us all to other flights? Give us that much money."
Honestly, this outcome would be fine by me, since it would correct poor airline behavior pretty rapidly. They already let you buy standby tickets; overbooking is double dipping.