Amazon wages are $15/h or more, more than double the Federal minimum wage of $7.25/h.
It's worth calling out that my car was paid off (and a Prius so gas/insurance was cheap), and my rent was really low ($300 a month because of arrangement with the landlord). Work also covered almost all of my insurance, which I think is unusual for jobs in those range. If those things weren't true, I probably would have saved little or nothing unless I started cutting back and focusing on buying cheap food to eat instead of just being happy with cooking instead of eating out.
Home ownership is possible if you save for years, or if you can get a grant to help with the downpayment (had a friend who did that). It's not pleassant, but it's doable imo.
I don't think you could have a family on a single $15/hr income. Even at 2 $15/hr incomes I would think it was hard, but I don't have children so maybe they're cheaper than I think. Although no one has ever said their children were cheaper than they thought.
So, I think it's possible to make a living on $15/h. Is it ideal? No.
If you think other regions aren't producing value in the tech ecosystem, nationalism is getting in the way of your eye.