The most serious hurdle for Australia right now is to decide what those who call themselves Australian want this Nation to be turned into at the next election. Australia is only one election away from not being Australia any longer.
Do people want Australia to be of European tradition & culture or do they want it to become an unmanageable hotchpotch of multi-ethnic enclaves with agendas of just plain self-interest to exploit with no regard to Australia as a cohesive society.