Regarding Monopoly: It should have each player as a bank Presidents. Of course the game would need the Glass Steagle Act in place or it wouldn't have any real limits.

Each player would compete with the other players as banks against banks. You could start off as a standard local bank and with successive degrees of game-play you would become a different type of bank with new financial options available beyond a mortgage.

Or perhaps each player would be a different entity, Federal Reserve Player, Legislative Branch Player, Venture Capitalist Player ...

You need to have turn based play. You need dice for randomness. You need a stack of cards that represent emergencies like "The unemployment rate is at a record low; inflation is canceling out your profit this year ... you lose 1 million dollars" or another deck of cards that might have "New Regulations in effect; inflation is low and you've earned greater profits".

Asension