A Question

| Tue Mar. 17, 2009 12:31 PM EDT
I've asked this before, but I'm going to ask it again.  This time I don't want it to get lost, so I'm including no long discussion or analysis.  Just the question.  Here it is:

Why is the modern financial system so profitable?  Shouldn't it actually be getting less profitable over time?

All types of guesses are welcome.  Give it your best shot.