I see this stat a lot and it leaves me wondering how many people are within, say, 50 cents or 5%[0] of minimum wage. The percent of workers earning minimum wage doesn't seem that useful (and I guess neither would the figures returned for my request).
In any case I'd find hours required to live alone within ~30 minutes of work a more compelling statistic. It adjusts for CoL and represents a reasonable lifestyle to shoot for.
0: not suggesting these are equivalent figures