JTR - C households spend in the range of $28,200-$61,500, so yes, probably covers most of us - rental puts most of us in there by itself.
geh065 - On the face of it, true. However, someone might want to see if there is an expat inflation index, might be different
Of course, if you measure the salary in ozzie dollars or UKP, a different story, but that is a different argument