The goose and the golden egg is an ok analogy.
A better one would be the host and the parasite.
In nature, even the simple parasite is smart enough to not kill the host. God gave them the host to live off of. And the host benefits.
Ticks have never killed a dog. Barnacles have never killed a whale.
Unions have killed GM, Chrysler,Hostess, CA, NY, IL.