Well, it is an island, so I imagine they could put the bodies in the water. It wouldn’t be 90,000 bodies, because they would keep the females alive.
I would recommend they read or watch “The Man Who Would Be King” with Sean Connery and Michael York, story by Rudyard Kipling. That was better executed, but still did not end well.
Caine, not York.
That was a great movie.