This graph shows the percentage increases in the Per kWh Consumption charge and the Daily Grid Connection charge from 2007 to 2015 in comparison to Inflation. This graph is mostly unrelated to the amount of electricity consumed as it's "per component" pricing, although a percentage of the increase may be related to usage bumping up into higher charging tiers. The Carbon Tax component has been removed to keep this comparison consistent.
This graph speaks for itself. The most basic and conservative observation would be that 14 of the 18 price alterations are above the rate of inflation and 11 of the 18 are more than double that of inflation.
Then there are the twin-tower years, 2011 and 2012, when the regulator must have been taking long service leave. Given the revenue they must have generated since 2011 I get a bitter taste whenever I read about any of the power companies crying foul in regards to the ability of the grid to deal with solar household generation.
Half-way through 2014 we set up automatic direct debit payments which brings with it a guaranteed 10% discount. Despite taking this into account the cost increase for 2014 was still well above inflation.
In case anyone reading this still has any latent sympathy for those responsible for setting power prices, the next graph should clear it up completely by showing the overall cost component percentage increase, compared to CPI, for the full 9 year period between 2007 and 2015.
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CPI figures sourced from: