Cocoa Beans are the main ingredient of chocolate, which is why Willy Wonka needs so many of them. The Oompa Loompas love cocoa beans, which is why they agreed to come work at the factory in the first place.
2005 film Edit
Cocoa beans are the main ingredient that Mr. Wonka uses for his delicious Wonka Bars. Whilst in the Chocolate Room, Wonka explains to the tour group about how cocoa beans are important for his Wonka Bars, and how he used cocoa beans to get the Oompa Loompas to work at his factory.