Capt.TuneDog ..
"How many international travelers do you know that only carry 10k in their luggage?"
My children travel with less than 10kg Trans Tasman, especially for summer holidays
Also it would be possible, one way or another, for a family of 4 to arrange things so that they get away with 2 or 3 checked bags and use the Jet Light fare to money on 1 or 2 family members.