This is lunacy, but at Sydney Airport now jets are being told to stay on the ground, ready to take off, engines turning, under empty skies, waiting for 20 minutes or longer at times, because the airport has exceeded its politically imposed capacity for airliner movements.

This farce, and thousands of passengers stewing in their seats wondering what the hell is going on while they wait for a new "metering period" to begin before they can get airborne, makes Sydney Airport a joke.