I see a confusion here between the concept of a minimum wage that an employer must pay to an adult worker, and the minimum amount of money, unemployment compensation, or government-funded benefits, that an adult requires in order to maintain a healthy lifestyle in sheltered accommodation, free from starvation, undernourishment or unattended medical problems.
I find it revealing that the unemployment benefits in Australia, for a single person, are about equal to the average minimum wage in the USA of $7.25 per hour, as applied to a 40 hour week.
The minimum wage in Australia is currently over $16 per hour. Since the Australian dollar, in terms of international exchange rates, has approximately equal value to the US dollar, this difference in minimum wage highlights the differences in the costs of living in the two countries.
Most things seem to be cheaper in the USA, especially Adobe Photoshop.