If you steal, Murder, or do anything of the sort, you get a Criminal Record/Bounty, the more and more you do this, the higher your Wanted/Criminal Record Tier is, Since you get this Criminal Record/Wanted thing you cant enter big towns and such, but can enter Criminal Settlements, you can do more bad things at these Criminal Settlements and get money out of it. Bounty Board for Bounty Hunters(Side Quest to get Bounty Hunter) so they can earn money, the higher the criminal tier or more bad things they do, A better paycheck, but harder, if that isn't gonna be in the game, how about a Monster bounty system where it gives Coordinates to where it is, you kill it and get paid, but each tier of the monster is harder and harder to kill.