Note: A chunk of this analysis is credited to a YouTube comment from Plume from the featured video.

Willy Wonka and the Chocolate Factory is one of the most nostalgic and memorable live-action musical films in the Americas. The wonders (and frights) of the chocolate factory, the songs, the large array of characters, and sets are fantastic. But one set that resonates so well is the climax.

Early in the film, Grandpa Joe and he snuck a sip of fizzy-lifting drinks, which caused them to fly above the ground, almost causing them to get maimed by the ceiling fan. Because of this mistake, Willy Wonka (who smoked a cigar as they walked into his office) disqualified Charlie in the angriest, most heartwrenching way imaginable. Yelled at to the point of tears, where Grandpa Joe (who lived in the same poor household as Charlie) and who so wanted his grandson to grow into a man away from poverty grew angry and vengeful, vowing to give Slugworth that everlasting gobstopper.

Immediately, Charlie Bucket is hit with a moral dilemma. Out of all the children, he's the kindest, most selfless, and humblest. In his years of poverty, he grew into someone who cared less for himself and more for those around him. He has his mother's kindness, grandpa's selflessness, and family's humble (yet ragged) life. Willy Wonka has the life that he doesn't: a great factory with a marvelous population of Oompa-Loopas that were free from a gluttonous life. His reputation is spotless and will remain so once the tour ends. Throughout the whole tour, he cared for their well-beings despite not seeing them for a long time, such as Augustus. Once he steps out of Wonka's office, he and his family will successfully leave their cabin and poverty behind. And with how Wonka shut them out, who can blame him?

Instead, he does something much more worthy than money: not stick to revenge or a selfish sense of justice. He walks back to the bitter man and gives him back his gobstopper, sacrificing every bit of fortune he could've had seconds ago. He lost his lifetime supply of chocolate and fortune, but didn't cave to something greater: his kindness. He didn't want to earn a fortune bitter and angry and hoped Mr. Wonka wouldn't feel the same back to Charlie.

The end result?

1. Wonka revealing the whole yelling exchange to be a setup for one last test: whether Charlie will be bitter and vengeful once he leaves the factory or not.
2. "Slugworth" was a close Wonka confidant.
3. Not just the chocolate, but the whole factory. The factory is his new home.

Willy Wonka looked for the "perfect" child to trust once he retires. Charlie Bucket succeeded every test, including the ones that looked easy on the surface yet difficult to solve.

This line is extraordinarily powerful.

Quote

"So shines a good deed in a weary world."

*gives crowd a box of tissues*

This was the line that changed the movie's whole direction and tone, but also signifies what Wonka was looking for. He lived and worked in his factory throughout his entire life. As great as it is to make a chocolate empire, he can't live such a life forever. Someone will have to succeed, and who better than, in his words, a very honest, loving child who he can trust once he leaves. The golden tickets were an invitation to see who can pass his tests, and if you observe, every room and artifact is a test for each kid.

1. The chocolate room, edible from the top on down. Augustus's gluttony caused him to fail his test.
2. The three-course gum that was still in development. Violet's obsession with gum caused her to have an emergency operation.
3. The golden-egg room, home of the finest geese and eggs around the world. Veruca's lust for an exclusive animal and spoiled behavior when Wonka rejected Mr. Salt's offer caused her to fail hers.
4. The Wonkavision room is the home of new TV-to-product technology. Mike's greed for fame meant needing to be stretched.
5. Everything in Wonka's office is cut in half, closely relating to Charlie's half-empty, incomplete life. Charlie passed his test, the only one to do so.

For how dark the world can be, sparkles of joy live throughout the world. Charlie represents that joy.