Until recently you could get an aussie sim with roaming data as part of the plan that would work here and elsewhere, no extra payment at all. Then the ID verification got tighter and they check you have a valid visa otherwise the plan gets cancelled.
The people who can pay will keep paying, the people who find it unpalatable will find the other options quickly.
And yes 1GB for a week roaming packages are ridiculous when you can easily find 10-20GB for the same or less price.
