Most dev teams above 4 or 5 probably could do the same amount of work if one of their co-workers got the axe. But it'd probably come at the expense of other factors: employment fatigue, tech debt, less reliable quality.
Or of course the response is: sure I’ll work 20% more hours, what is the comp?
This doesn't seem relevant, as the article is about minimum wage.
It is relevant. I think the implication of the commenter two layers above was that the 10th worker wouldn't be fired because if 9 workers were sufficient the business would have only hired 9 in the first place. This may not always be correct. 9 works may indeed be sufficient, but at wages lower than the mandated minimum the 10th worker is better. For that reason, a wage hike can indeed cause workers to lose employment.