I'd recommend reading the actual law, as passed by parliament. Knowing your rights and legal options under the law and based on that approaching your MP (if you are still registered to vote in Australia) with your concerns to encourage them to address them.

To do that you really need to know what the law actually says and requires. Here is a start: TCN/TAN are not limited to Australian citizens. Revoking your citizenship will not shield you from being issued a TCN/TAN, but will lessen the value of your voice in engineering change.