You have a point. Death of a Salesman takes place in a home, so we can all identify with it because its scope is quite limited and limited to things that we are all familar with. Contrast that with Wall Street and its grand scope.

But, I read God's Banker in the 80s after the Vatican Bank scandal broke, so I was familiar with it. Also, like many Board posters, I have read many books about the Mafia and am aware of how it threads its way into so much all around the world and how it operates basically, its character. As a consequence, the storyline in GFIII was not unfamiliar to me.