Fortunately, a bug gave him all the money the ATM had, totaling over $1,000,000 US. The police didn't do anything.
Fortunately, there was Purple People Rights legislation passed around the world and he got his job back.
Fortunately, the machine willy Wonka used to turn Violet from a blueberry back into a human girl, was still around and cured Jack of his grape state.
Fortunalely you arn't alawed to end the story, so Jack din't die, but he want to heaven the machine didn't work well, so he was still purple.