There was a server I used to play, it sucked overall, but it had this cool firefighter system with firefighters. You could easily make a good 500 bucks from extinguishing fires. I think it would be a good idea to have a similar system. Fires break out, firefighters rush in and extinguish them, making them money. Currently most jobs don't make much of any money, however, firefighters seemed to make very good money on the server I was on.