[neaden]

The problem with the percent rule is that people could easily fall in and out of it. If we imagine someone who is an Uber driver but also works part time as an employee at another business, depending on how many hours they get in a given week as a part time employee they could go above or below the 80% figure. From Uber's standpoint you could also have two people who each drive for 10 hours a week earning the same pay, one of whom that is the only source of income, the other it's only 20% of their income.

[drag0nballz]

Exactly -- and companies would not want to hire contractors because it's impossible for them to know if someone is going to be treated as an employee all of a sudden (say they hired them part-time but their other p/t gig ended). I don't know how Australia deals with this.