Without overtime, $17/hour works out to nearly the exact personal median wage in the US, and I don't think that making more than 50% of the population is a situation that can be accurately compared to forced prison labor.

So, yes: Some people have no disposable income at all. Some live in debt. Sometimes they have no choice, sometimes it's poor planning. None of that is the equivalent of forced labor, Or longer imprisonment if the prisoner chooses not to work.

To be clear though, I haven't done a thorough examination of my own opinion on the ethics of prison labor, wages, etc. I'm not stating an opinion on that one way or another. I'm just saying that it is not a valid target of comparison against Amazon's wages in this case.