The chorus has been building for months from Coalition figures across the country: "now is not the time to introduce a carbon tax". And it's now swelling to a crescendo.

"This is the worst possible time to be introducing the world’s biggest carbon tax tax,’’ said Tony Abbott yesterday. "I cannot think of a worse time to be introducing the biggest economy wide carbon tax in the world," tweeted Joe Hockey on Sunday. "Now is not the time to introduce the world’s largest carbon tax," piped up Bruce Billson this morning.