AGL (NSW) gas rates are going up again, from 1 August. Increases between 7.4-13%, including an 11.5% increase in the Supply Charge. It will have been 6 months since the last increase (from 1 Feb.), when the increase was 12.3% for every band. But the Supply Charge was not increased in Feb. Is the rise in Supply Charge next month justified? I get that gas is more expensive, but the pipes, etc. are the same as before. Why the 11.5% rise? (Please: no "many factors" answers. Kindly provide credible ...