There shouldn't be any need on this forum to explain why stabilised approaches are a good idea and are SOP in just about every airline I can think of. If a pilot on a check cannot perform to the company SOPs then I'm afraid he fails and that's that. A serious chat about the potential for disaster would be appropriate and it matters not a whit if the Feds are on board or not. In fact if a pilot operating with you does this on any flight just take over control and tell him that he'll be allowed fly the aircraft when he decides to do it properly. In the case quoted, a go-around should have been performed at whatever stabilised altitude
is quoted in your SOPs. Swallow your pride and go around and some day it may save your neck. Not easy to do I know, but still the sensible option.
Rubik - Airbus (and Boeing etc) SOPs are merely recommendations for operating the aircraft. Most carriers adapt these SOPs to suit their own operating environment.