Slim - He doesn't mention what service he was receiving so don't assume it was any kind of radar service. Unless the Auster had a transponder it may well not even have painted on the radar.
Fuji - I fly singles & twins mostly outside CAS so I do appreciate the speed of the development of conflicts, but I still think that see-and-avoid works pretty well.
The thread's drifting slightly, however. Unless the original poster knows for certain what the pilot of the other a/c was doing & to whom he was talking, all that name-calling was out of order. Maybe he'd just had engine-failure & a sick passenger & was busy declaring mayday on 121.5?
It also goes to show that even though you've spotted one you should keep looking for more!