Gillard had to lie to someone after she failed to get a majority. She had promised no carbon tax and also promised to put a price on carbon which she intended to do using a trading scheme. For either she needed Greens support but they would only support a carbon tax. So she was caught in a Catch 22 situation and faced with having to break one promise or the other decided to break the no carbon tax promise as that kept the Greens onside. Dave R.
