Some HK numbers for you based on this morning's exchange rate (AUD=5.79 HKD). Taken a bit of a beating over the last 4 years with 3 pay cuts.
Most expats on top of ATCO II : Salary AUD156,000 p.a. + Accomm Allow AUD48,000 p.a + 25% Gratuity every 3 years approx AUD117,000.
Top tax rate is 20% with max overall = 16% flat. Accom allow taxed slightly differently. Normal tax bill with spouse rebate is about AUD30,000 p.a. with gratuity spread over 3 years.