Its not an excuse. If someone had an intellectual disability, would you say they are stupid for not becoming a manager? Of course not - some people are just not suited to the job, and I am not, due to the fact that I am deaf.
Besides, would I want to work at least 10 hours overtime per week and not get a cent for it? Fuck no. Many people want to be managers, then they become managers and go back to being crew because despite the extra pay, the hours are longer, and you get nothing in return.
I have found management pays significantly better in the states. I'm not sure about Australia, maybe they don't value people.
imagine that
a country where the janitor and the administrator get paid the same
We call them cleaners over here. Our full time cleaner at my old sore gets paid around $15 an hour. I would be happy with that during the day, but working during the night, I'd expect a bit more.