How would you improve the Australian tax system?, page-38

Average cost of private healthcare in 2018 $166 p.m $1,992.
People earning $140,000 a year pay 1.5% levy =$2,100
$200,000 would pay $3,000
$500,000 would pay $7,500
etc

So basically if you earn more than $140,000 a year you take out private medical even if you have no intention of using it.