[mbarbar]

>but extending copyright way past the original creator life is a logical conclusion when you combine the two.

Not necessarily, unless you mean that copyright should always be able to be passed down should the holder wish. In your example, the father can double dip: write a (good enough) book, make money through sales (more guaranteed through state-enforced monopoly), buy a house with, maybe part of, that money, then have both the house and copyright inherited by the inheritors.