I suspect that this submission from QF is being driven by their plans for Australian Airlines. In their initial AOC submission they planned only 6 flight attendants on their all economy B767-300's but this was rejected as it did not meet the 1:36 ratio. They are doing everything possible to keep the Aust Airlines Direct Operating Costs (DOC) down.
To compare crew numbers with other international carriers in the region does not assist QF in their argument as SQ and JAL carry approx 22 flight attendants on their B747's as compared to between 13 & 16 (depending on configuration) at Qantas.