Lew is right. Let's buy more Amazon products to help the workers. To paraphrase Mises, working conditions are determined by the customers. NBA players fly in private jets and stay at the finest hotels not because their team owners love them, but because the customers do.
BTW, thanks to Amazon, in just five years, my little publishing company went from $2400 to print 1100 books to Amazon's much better deal: $39 to make my new book immediately available to all who want it.