I will say that the bust of Ceasar is a perfect McGuffin for plot driving...
Second only to the 'Travel Permits' in Casablance, huh?
Also, although we see it all from their POV our boys are very much bit players in the ACTUAL two protagonists' ongoing plot...
And I guess both McCreedy and Armenderiz assume they are the hero in a Quest / Overcoming the Monster plot...
I dunno that there's any overcoming the Greed monster, Ghis - it looks in pretty good shape to me at the end!!