Annual vehicle permit for Bribie is $126.
Whilst I agree in principal, I reckon they would make an all-in-one permit too expensive to be worthwhile for anyone who doesnt frequent all locations. I guess this is all about making it affordable, but couldnt see them doing an all in one pass for any less than 300. They would need to keep an option of buying separately.
Unless you frequent locations often, I think the monthly passes are a reasonable cost. For me the prohibitive cost for going to Moreton is the price of the barge rather than the vehicle permit.
I have an annual pass for Bribie, and buy a monthly pass when going to Fraser, which I have been twice in last 12 months, so thats about 200 in permits in one year.