Think of it this way - often when people become extremely wealthy, they turn to philanthropy. Because they want to give back. If someone becomes ridiculously wealthy and gives nothing back, we as a society tend to think poorly of them. Why? Because they are extremely fortunate and highly successful - and they could so easily help others without any negative impact to themselves. That ease makes us unhappy with them _not_ giving back. Because in their particular circumstance, we generally consider it _right_ to use their resources help others. Not required, but right.

Same thing with a company like Amazon. They are enormously wealthy. So we look poorly on them when they don't give back to those bringing them even more wealth. Because they easily could. Because it wouldn't hurt them at all. Because it is right.