Most people complaining here would happily pay 10 cents more on their $10 Blu-ray if it meant that the workers were treated better.
Or what about some tighter regulation of their working conditions? Sounds uncomfortable - might be cheaper to just improve the situation of the workers ...
The unions are just doing their work with Amazon, and they are doing it very well.
So I guess it does impact their brand but unfortunately sometimes there is no where else to go.
You can't just complain that homeopathy doesn't cure cancer well enough without explaining how you would cure cancer.
When an employer doesn't pay an employee a fair wage, they're being subsidized, either by the government (Walmart is an excellent example; their literature specifically instructs their associates on how to collect government benefits due to them not paying a living wage) or by society as a whole.
From an economics perspective, would you not prefer consumers be responsible for the full cost of the good/services they're receiving?