i could imagine credit and debit cards working just think when your in a shop you go to pay for something only to find out that you have no money on your card opening up routes of stealing the items or going in to debt and people coming to repossess your belongings to pay for it.

If i could have a job as a pharmacist in the game would be good because i would be able to have a small pharmacy in the town and i can be a "Legal drug dealer" i can also earn extra money by selling people drugs in the backroom of the shop