"Millions of people live every day with only a couple of dollars a day."

Not in the USA they don't. There is no possible way that an individual could pay for food, clothing, and shelter on that income.

Sure, different countries have different living standards. That's the point. "Living wage" is an undefined, ever changing concept. Populist to the core.

What a strange argument; you can most certainly quantify living wage for a specific region by looking at the prices in said region.

It's not only the prices but the specifics of what "livable" means. For some it just means the essentials, to others it includes luxuries.

No, it's defined fairly clearly.

Where can I see the definition?