So mum with four school kids that lives in a State house and owns an old jalopy and Facebook is the closest thing to tech she uses is going to do odometer readings and use an app to pay monthly? 

Ditto grandma who can barely fill her own car once every three months at the pump and only has a car she drives once a week to pick up groceries down the hill. 

I can think of a lot more cases where changing to RUC is going to be difficult for them to understand and implement and using an E-RUC company to do this is going to be an extra cost. All you people looking after parents prepare for another job to add to the ever growing list. 

Will commodity prices increase when trucks pay a lot more? 

Personally as a law abiding procrastinator, I don’t like the idea of any more admin taking up my days and adding an extra layer of angst when it slipped off my radar and I see a cop car in the next lane, nor the fact that as someone else has pointed out that it could eventually become big brotherish in many ways. Petrol tax is simple.