This has already been discussed, emotions have been fired up many times before...
I think, officially, shares are open knowledge.
But since money is perfectly trackable, it should be open knowledge too, IMO. After all, this is a game of expanding networks and delivering goods, it isn't Memory. Why should the guy with photographic memory be at an advantage. More importantly, I like to lose because of my mistakes, poor decisions and bad strategy, not because I can't add fast and have a bad memory.
With the size of the board to see and reach around it, it would be hard to keep this a secret.
Exactly, so just keep money open knowledge.