There were a few novels recommended by the free lottery system. Among them," Movie World Lottery " was a system lottery novel. It told the story of the protagonist entering different movie worlds through the lottery system. Other than that, Feudal Lord: I Have a Pigeon Lottery Machine, The Strongest Lottery System, The Mortal Heavens Lottery System, and The Strongest Technology Lottery System were also recommended free lottery system novels. These novels all had different plots and story backgrounds, suitable for readers who liked the lottery system.
Maybe you could have a major scandal or fraud associated with the lottery process, causing public outcry and forcing it to stop. Another option could be if the main characters decide to expose the negative aspects and actively campaign against it.
The lottery in the story works in a very primitive and cruel way. Everyone participates, and the one whose name is drawn is chosen as the victim with no clear reason or logic behind it. It seems to be a blindly followed ritual without any real purpose.
To be honest, I can't recall who wins the lottery precisely in that short story. It's a story that keeps you guessing until the end. Maybe you should give it a read and figure it out for yourself.