Everyone's electricity prices (on the east coast of Australia) have gone up a lot over the last 5 years. It clearly is a complex and compound problem BUT .....
your only electricity expenses.
I recently checked with ClickEnergy (our supplier) and was able to get a ~22% discount. We had switched to ClickEnergy about 5 years ago, and had got a 10% discount. The point is - if you thought you negotiated a good electricity discount a few years ago, then much better discounts are available now. And if you ask your current supplier, they will probably just give you the higher discount.
I noticed recently that Alinta (currently a major west coast electricity supplier) is wishing to break into the east coast market and is offering 25% discounts.
Point is: There are some simple things you can do to save a fair bit of money.