CASA isn't a commercial operation either, they work on cost recovery plus a whole bunch of tax payer money (avgas tax). I agree that it appears cheaper to go the CASA way (no annual fees or regos), but from what I'm told, getting a LAME to do your maintenance is one of the huge costs and compliance with the regs (i.e. you can't just go fit an iPad to the console).
Our focus should be on ways to minimise the costs of RA-AUS, thus lowering the membership fee requirements. If we can also work on ways to reduce the amount of regulation and complexities, that will also reduce the cost base. You're right in saying that a majority of members are only part of RA-AUS because it's mandated, which is most likely why it takes a less advocacy roll and why member participation in elections and meetings is low. You can't claim to be the voice of 10,000 members, if those members haven't had input into the message.
I don't own an aircraft so I'm not really up to speed on the RA-AUS maintenance rules and the increase in complexity and compliance you mention, however if that's the problem then shouldn't we be trying to address that rather then create a new entity? How much of that problem is from CASA and would be required by the new entity anyway and how much is our own doing and can be fixed?