I agree with raydarkhorse. If we were perfect we would all be sitting under a waterproof shelter built from only natural materials and cooking fresh trout over a fire with only a pocket knife and a book of paper matches in hand. However that is not the case and we all supplement our basic survival kits with items we each feel will benefit us best in a survival scenario. For example: I am terrible at starting a fire with a bow and drill or plow method so I carry more fire starting ability than a guy who is good at it.
As far as luxury items I was referring to things like; A gortex bivy sack instead of a plastic garbage bag. A 123v flashlight instead of a photon micro or chem lite. A snow peak titanium cup is definatley a luxury item compared to a sheet of tin foil when it comes to boiling water. IMHO...