Unfortunately most Australian employers can easily work around #3 by just employing staff on short fixed term contracts. Then they're under no obligation to renew them.

In theory they have to offer permanent employment after a certain time, but there are lots of ways around that. I worked as a casual staff member at a university here for 8 years and they just shuffled me to a different department when I got close to that point. Didn't bother me as I was both working and studying there at the time but the "casualisation" of staff that want permanent roles is rampant.