I don't think you have much to worry about if you're a WF employee. Amazon actually treats their employees very well. In my experience here, I've never seen any of the things the NY times article talked about, either on my team or any other team I've interacted with. People have a healthy work/life balance (40-50 hours a week), get paid very well (definitely above average, and probably in the top 25% of industry), and in general they are concerned with long-term employee sustainability, rather than letting employees burn out and quit.
I know that there are some stories about bad experiences in the fulfillment centers, but keep in mind that those positions are temporary seasonal work by unskilled labor. That's a completely different environment than full time employees work in.