Similar topic, I think the rating board is a load of kak, yes they don't block content, but the result is the same, we are unable to have access to content that isn't rated. Also since this is meant to be a public service i don't companies should have to pay for it to be rated. The current system amounts to extortion, "you can only release your product in our country if you pay us".
I think an easy solution to this is to make a default all content is R18 if you want to have a lower rating you have to have the product rated. (At least as an adult we can make a choice whether we want to use the product or not). This is kind of how xbox indie works, ever Indie game is rated as 18.