It just baffles me... because in Australia you don't sue someone because they hit your car... that is what either your or their insurance does. If their insurance is null or void, then you yourself have your cars insurance which you can claim upon.
Insurance companies themselves have internal arrangements to seek cross monies between themselves. We also have what is called third party insurance compulsorily upon vehicle registration which covers personal injury, ie. if you are in the car and are injured, then you can sue the third party insurer if you lost a limb or have some life long disability.
I don't think I would like to live with all this sueing of one another for something like just a car accident that has no personal injury involved. Yuk!