I think banking should be changed. When a withdrawal is made, perhaps a percentage is taken for "bribes" or something. As a Real Life banker, I can only imagine that back in the day, the mobsters weren't just walking up to the teller window and making large cash deposits. They were probably greasing a few palms along the way. 

The added benefit to this change is that families can have a "family banker" who can take a smaller cut (or none at all, depending on the Don's rules) to keep the money safe for family members. Other families would try to figure out who this person is so they can roll him or even whack him to eliminate a family's bankroll just prior to an attack. This could have some really interesting second and third level consequences. Thoughts?

I like the idea,  it could also be a nice way to take a little cash out of the game.

We've modified the laundry code to work invisibly behind the scenes -Squishy.

this is a refence to a previous game change. a series of changes were implemented, the end result being that when you withdraw money from the bank, a small percentage is taken out, money launddry style.

This was done before and the whole user base went mental.