I’m a published author, and I think that the original copyright term of 14 years with the option to renew once for 28 years total was perfectly reasonable. At most, 25 years with one renewal for a total of 50 years is still fair.
I’m borrowing from my culture to create; it’s only fair that what I create should become part of the culture so that others can build upon it. And if I can’t turn a profit on a novel in 50 years, then to hell with it.
Life of the author is excessive, IMO. Life + 70-90 years is outrageous, since the monopoly on a work no longer benefits the creator, but descendents who had no hand in its creation.