The age old thing that will never change
"I am a low user SC is too high"
"I am a high user SC is too low"
The reality is its very difficult to see transparency in regards the SC.
It should be the costs of the infrastructure. Ie the "fixed" part
The unit price should be the variable part, ie the costs of the generation side
The problem is the bit that sits in the middle, not really either of the above, the meter readers, the admin staff etc etc
We know they added the failed supplier stuff to the SC, it also has the green etc on it, You could argue all day about whether thats the correct way but your never going to get agreement.
Eg should high users have to pay more for the failed companies, or should we all bare the burden equally. High users aren't necessarily high users from choice.