I don't think that blanket statement is false if you interpret "workers" as "workers as a whole" (as I did when I first read it). Certainly an individual worke

I don't think that blanket statement is false if you interpret "workers" as "workers as a whole" (as I did when I first read it). Certainly an individual worker can quit and (try to) find a better-paying/better-hours job, but as GP notes, that method does not scale very far.