Czarcasm: you shouldn’t torture an innocent person to death against their will, simply because someone offers you a candy bar to do it.
But that’s the candy bar with the Golden Ticket!
Heh :). The point is that, if the bedrock principle holds true (desires ought to be respected, absent compelling conflicting desires), it’s trivial to come up with examples in which morality points away from a particular course of action. Pointing out that vaguely-worded general examples don’t hold true is irrelevant.
Anyway, if you torture someone to death to get a Golden Ticket, Wonka is going to feed you to the marshmallow piranhas. Seriously, dude’s a candymaking psychopath. The book was a precursor to the Saw franchise.