Average wage in Australia AUD $75k per year. Average wage in...

Average wage in Australia AUD $75k per year.
Average wage in Indonesia AUD $18k per year.

Indonesia average wage is approx 25% of the Australian wage.

Based on 2012 figures Indonesia's GDP is approx $US1.237 trillion compared to Australia's GDP which is approx $US986.7 billion...so the Indonesia economy is 25% larger than ours.

I guess what I'm trying to say is you may need to recalibrate the numbers you are using. 1/20th is a long way from 1/4.