There are two things you probably need to know about
1.) Australia did not "Dumped" all its economy inside China.
2.) Geopolitics and Economic are two different factors, altogether.
For the first one. Australia is not as reliance to China as you may think. in the year of 2014-2015 (2015-2016 data wasn't available yet) Chinese trade represent 31.8% of all Australian Export, and 21% of all Australian Import. While the total merchandise trade are 26.3%, which is slightly higher than a quarter.
However, it's not the number people should be focus on, but the trend, the YoY (Year-on-Year) comparison saw Chinese drop in both Australian Export and Total Merchandise trade at 18.6% and 7.7% respectively. While at the same time. Australia-US trade have increased in all 3 figure. It have indicating the Australian moving away with goods/merchandise trade with China.
While 26.3% in all general trading and 64 billion in FDI (Compare to US's 758 Billions), I don't think it can be said Australia is dumping their economy inside China. In fact, considering Australia is a financial market driven economy, Australian Economy as a whole does not in fact depend on China in any way or form.
DFTA Data on US and China year 2014-2015 as follow
https://dfat.gov.au/trade/resources/Documents/usa.pdf
https://dfat.gov.au/trade/resources/Documents/chin.pdf
For the second part. Economy and Politics should be 2 completely separate entity, as business goes where the money goes, and it will be open to whoever basically waving money in front of it. If Congo have money and opportunities to invest in Australia tomorrow, being a financially driven country, Australia will open both arms to catch that turnip.
The problem is, geopolitics, coming from the word "Geo-" means proximity. Which means basically who is closer. And in the current state, US is too far for any potential trouble, which the FP between US and Australia would not clash. Hence such a cooperation can be established. However, China and Australia are lies within the same sphere of influence. And as such, there are potential conflict of interest between FP of China and FP of Australia. And mostly it was the Chinese action that was basically scaring the Australian in general. And that would upset the dynamic of influence between Australia and the region. Solution? Australia have to find a counterbalance to maintain the status quo in the region. In come United States.
Say what you will with the Foreign Policy of the United States, but aligning to them is of the interest of Australian Government, until the day the US starting anything that Australia saw as a conflict of interest, then and only then, the Australian alignment would shift, to possibly China
Meh, we lost to the Emu back in 1930, not surprise at all if we lost a war on kangaroo.
Emu War - Wikipedia, the free encyclopedia
The nature is always our enemy.......
lol, look at how this Japanese dude try to use a Greenleaf (Extreme Leftist) publication in 1992 (At the height of East Timor conflict) to try to drive a wedge between Australia and Indonesia.......
This dude is getting a tad bit desperate, don't you think?