Oz is a little slow to the table.
In Alaska, if your boss expects to take after hours calls, you MUST be paid for standby time. I rarely got called but the $250 a paycheck extra was nice.
Salaried exempt in the US currently means 24/7/365 if desired or quit.
Thankfully at the moment good help is worth more than the extra gained from pushing people to the edge. For now.