Most Jap WL/ML don't have uni degrees so impossible to get a job that pays good salaries. They come here to support their family and kids, making money to pay tuition fees and of course some for payong debts and buying luxury goods.
My old Jap regulars told me:
rates would be similar but more profits and customers
paying no income tax
no risk of bumping into friends, families and acquaintances
They tell their friends and families that they work at cafe or restaurants in Aus and earn good money.