I can apply Australian citizenship next year but I will leave ASAP after becoming a citizen for Singapore, Dubai or Hong Kong where the tax is < 20%
To pay $89,000 in taxes you'd have to be earning in the range of $350k. Do you think you're hard done by? I'd be rather annoyed if you were eligible for family support allowance in that earning range? (partially because I'd be missing out on a decent chunk of government support myself)
What am I missing about your situation that makes it remotely sympathetic?
I want to know why you are keen to become an Australian citizen if you’re not enthusiastic about contributing your share.
Constructive discussion about appropriate levels of taxation is important, but let’s at least agree that the things we rely on (roads, hospitals, schools, defence, …) cost something.
If you hate taxes and fees, Singapore has a 60% Additional Buyer's Stamp Duty on residential property applied to foreign buyers, on top of an already insane property market. There's huge fines and government intervention into _everything_ and a massive high-stress culture.
Hong Kong is equally absurd for property and has a sword hanging over its head, that falls if China ever makes a move on Taiwan; the inevitable US and global sanctions would decimate HK.
Dubai is just a comical option.