As the fairytale goes, Jack traded in the cow for magic beans (like McDonalds trading in 14 years of goodwill), which then grew absurdly - like gen soy. He used these to climb to the giants and steal from them - first gold (which he squabbled away), then a golden goose, and then he gets caught (and has the beanstalks destroyed) when he comes back for the harp. Once the beans come tumbling down - he lives happily ever after. Which McD could do, too, if they abandon their magic beans!
Greenpeace Against Gen-Food