Hey waste gate, your descent speeds were introduced because of too many unstable approaches!! as identified by your FOQA program. It's not about efficiency, its about accommodating for the lowest common denominator - the QANTAS PILOT!! Qantas couldn't give a stuff about fuel. Like I said, if you wanted a more efficient operation you would be cruising at 41000'. Don't blame management on this one - this is QF crap at its best!!! Speed up or piss off!!!