Hmm, It's not uncommon today for grandchildren to be in there 30's when a grandparent dies. Thats around children having age also.
I could easily see it being common already for an author to die at age 90, leaving children (aged ~60), grand children (aged ~30) and great-grandchildren (aged ~1)
That gives all of those people 75 more years of income from the original authors work. Which leaves us with grandchildren (aged ~105), great grandchildren (aged ~75), great-great-grandchildren (aged ~45), great-great-great-grandchildren (aged ~15) once the copyright expires, if it is never extended.
I'm not sure i see why the great-great-great-grandchildren of an author deserve the income from that work into their mid to late teens.
I could easily see it being common already for an author to die at age 90, leaving children (aged ~60), grand children (aged ~30) and great-grandchildren (aged ~1)
That gives all of those people 75 more years of income from the original authors work. Which leaves us with grandchildren (aged ~105), great grandchildren (aged ~75), great-great-grandchildren (aged ~45), great-great-great-grandchildren (aged ~15) once the copyright expires, if it is never extended.
I'm not sure i see why the great-great-great-grandchildren of an author deserve the income from that work into their mid to late teens.