I could not care less about downvotes, but I enjoy discussion. And I certainly think people would like to disagree with me, but it seems none are really able or willing to form coherent counter points - which I think puts a very sad frame on the disagreement. So I thank you for changing that, though I think there's something you may not have considered in your logic.
At the most basic level we can view a company's profitability as a price vs demand curve. If your price is too low then you're leaving money on the table. If it's too high then you're also losing money since you could earn more by charging less to more people. And I'm sure you'd agree that all companies are really trying to maximize that curve.
But the thing here is that competition is not some tertiary element not considered in our basic price vs demand curve. It's in most cases the single biggest driving factor of the demand function. When there's no real competition, you can increase your prices quite recklessly - see Time Warner or Comcast. But the amount that Amazon can increase their prices is strictly limited due to competition. If you're going to buy an electronic component do you buy it at e.g. New Egg or Amazon? It doesn't really matter if its the same thing - you're just going to go with wherever is cheaper in net (e.g. factoring in rewards/shipping/etc), even if that price difference is really quite small. The point here is that while you may think that Amazon could raise their prices let's say 5% and see a 1-2% growth in profit, but this is a question that they are undoubtedly constantly researching - and they disagree.
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And in any case this is literally the case for most all small margin businesses. For instance WalMart has 2.3 million employees and $13.6 billion net. Our $1k/year raise costs them $2.3 billion, or 1/6th of their entire available income. The only companies that are truly lush with money are companies that sell their product at extremely high markups, or companies whose product enables the minimize labor, such as software. For instance Apple, as an example of the former, nets $48.4 billion with 123,000 employees. A $1000/year raise there would work out to 1/400th of their available revenue. Google/Alphabet, as an example of the latter, had a bad year last year, but generally net around $20 billion on 72,000 employees. Their $1k raise works out to about 1/278th of their available revenue. It creates an ironic result that few people would complain about the wages Google or Apple offer, yet they actually offer their employees a far less 'fair' share of revenues than do the companies that people consider greedy.