In this version, unlike the book, all five kids break the rules at some point. Charlie does so by drinking the fizzy lifting drinks. It nay have been Grandpa Joe’s idea (fuck Grandpa Joe) but Charlie went along with it. Charlie redeems himself in the end by giving back the gobstopper but fuck that shit because the other kids were never even given the opportunity to redeem themselves. Mike Teevee stayed out of trouble the longest and therefore should have won.
It was always Wonka’s plan to “fail” all the children. It was only then that the decision about the gobstopper was most meaningful.
None of the children knew Wonka wanted an heir. None were promised anything but a tour.
and a lifetime supply of chocolate, iirc. but I think you’re right about Wonka planning to fail the kids. he prolly didn’t want a kid who’d just mindlessly do the tour without going a little crazy.