Tax
https://www.exfin.com/australian-tax-faqs
http://www.mondaq.com/australia/x/206608/Income+Tax/non+australian+resident+for+tax+purposes
Employment
Employers/clients who contract you long time (say a year, or a recurring contract) may be dinged as avoiding employer/employee employment regulations.
Proposals
Emigration
Renouncing Residency
Legal case where an Australian ran into issues because he kept certain ties with Australia.