Great story ... but someone who delivers packages for $18/hour as an independent contractor isn’t even on the bottom rung of the ladder. They’re going nowhere in Amazon.
But it is not a job where you expect to go somewhere. You make your own hours and you are a freelancer. No one is forcing them to take the job. I’m not an extreme capitalist. I don’t like robber barons. But I see no wrong with this. They are taking a job in which they’d give concessions to get concessions.
Or I could be completely wrong :-)