Why is Matt Damon the narrator?

Matt Damon is an actor, I would have preferred someone credibile in financial matters to narrate this film, not an actor reading through a set of lines. Furthermore it strikes me as ironic that someone of Damon's riches could pull off a 'serious film' about the global economic crisis. Movie-stars, footballers, pop-stars as well as city bankers/traders etc are just as much a part of the capitalist, celebrity-obsessed society we live in (in the west). I think that it is very hard to make a film about this subject matter 'objective' - (if objectivity is even possible) but seen as this film is made by Sony, and has Damon reading the lines, I'm sorry but I can't take this film seriously. Seems like another commercial ploy to me.

For the record, I think Matt Damon is a terrific actor, I love all the Bourne series, and thought he was brilliant in The Talented Mr Ripley and more recently True Grit. I do not have a personal vendetta against him, I simply think that an actor should not involve himself in a documentary of this subject matter.

Please voice your opinons...