Aligning with only one side of the two coalitions (Western world and Authoritarian world) is sure way to die for third world countries.
This is especially true for Indonesia, as it's the closest Southeast Asian neighbor of Australia. Indonesia aligning with China will threaten Australia greatly, which will lead to preemptive actions from Australia.
Australia and its Western allies had assisted the independence of East Timor from Indonesia not too long ago. Further deepening of cooperation between Indonesia and China will only lead to alienation and suspicion from the Western world. Most likely the Western world will promote more segregation movement in Indonesia and create more East Timor to sever up the country, rendering easier control over the region.
Look at what happened to Aung San Su Kyi when she tried to promote more economic cooperation between Myanmar and China. The Western world gave her up and Commie China supported the military junta to depose her.
