You're right, $23 is what I usually use and rounded, and that's an old number probably based on my own experience of when the minimum was okay. Looking back, even your range may be too low, as production began to outpace wages in the early 70s, making a comparable matching minimum close to $40.

In the end it's about a wage being livable, whatever that needs to be. And it probably shouldn't be a per hour number, as a company forced to pay per hour an amount can easily just reduce hours, defeating the point. Some sort of universal basic income, so wages become a supplement and not slavery? We have to change somehow.