The problem AOTW, is one of "regulatory capture" - the GFA, SAAA, RAA, etc. become "arms" of CASA and cease to be representative of the views of their members, instead they become instruments by which CASA imposes its own policies on its subjects.
The first symptoms are when members notice that CASA imposes some new and onerous regulation (say the fuel reserves one) and your association, instead of vigorously opposing it all the way to the Minister, "explains" the regulation to you and mealy mouthed says it tried very hard to change things without success.
What happens next is that you discover that your association is meeting regularly in Canberra with the regulator and it is you are bluntly told by your national committee that THEY are running the show and your input is both unwelcome and unnecessary.
It happens regularly. Its happened to Yachting Australia which no longer represents yachtsman's concerns.. I've even done a bit of regulatory capture myself when working for Government.
To put it another way; you cannot serve Two masters, CASA and your members.