The question is why did the Australian government let that exchange operate without proper inspection or review of that company or even know that the CEO or any executives have a background of being a criminal.
I guess the Australian government didn't know in the first place who are this people operating from behind. I try to look at the person pointed out by @kenzawak and it seems the website is already down. (https://samkaragiozis.com/). I also try to check AUSTRAC, (http://www.austrac.gov.au/about-us/austrac) which is Australian main agency, having the full responsibility for anti-money laundering and perhaps they did a good job nailing those crypto exchanges being used as front for illegal activities.