Who makes money off vehicle registration in WA (it's privatized)? [View all]

Please enlighten me if anyone knows who owns/makes profit off vehicle registration in WA. It's privatized but despite extensive online searching I haven't been able to find out why this happened or who makes money from it. When I called the vehicle registration contact number and asked, the woman who answered the phone refused to answer, then hung up on me.

Thanks for any information.