@t because your "correct" binding auction isn't really used and is flawed? From Wikipedia: "Vickrey auctions are much studied in economic literature but uncommon in practice". The most common auction is the one where the highest bidder wins.
@Warilized She was planning to try and escape her new master, not the slaver. I'm sure it would be easier to escape one person than an organization that's made to keep people in shackles.