Except our fuel price is set against the Singapore price.
When it comes to increases they can blame the crude price and the exchange rate etc. but when the shoe is on the other foot and both of those are moving favourably they just point at the Singapore benchmark and go "nah it hasn't shifted and that's what we set our price against so just lube-up and take it, biatch"
And the ACCC says ahh OK do as you wish, we'll just look the other way. And governments prefer higher prices as that means more GST & excise so there's no pressure from them on the ACCC to actually do their job.
It'll never fall as much as it should but will always rise at least as much as it should. Any any other industry that's referred to as ratcheting and is illegal and will result in smacked knuckles.
TLDR; Suck it up and get used to it princess.