Living Australia, I had seen money change owners among friends literally dozens of times. Not huge sums ($500-$3,000), but big enough to matter in mid-20s. It felt normal at the time, though in retrospect I can see that most of our families were poor and we had nowhere else to turn save for other young professionals. I'm not sure if that was due to co-dependence or friendship, nor if there is much difference between the two.