Supposing a total lack of basic human good will towards their fellow human- which I don't assume they do not have- they are dependent on the good will of the public which is not absolutely bottomless. Serious answer, not snark.
I don't think that replacing someone who is unhappy with their job with someone who is eager to have it is a lack of basic human goodwill, unless you are the only employer in the world, which Amazon is not.
A cynical person might even float the idea that Amazon WANTS that to happen so that there IS a regulatory burden because it can bear it and its would-be competitors / start-ups can't.
But that's too dark even for me... for now.
So back to original question- what about the risk of future, widespread #AmazonHate ?