And wage disparities are only bad where they don't make sense. But at AMZN, they do. AMZN has both some of the least skilled workers in the world, and also some of the most skilled workers in the world, which unsurprisingly demand vastly different rates.
The requirements to be a warehouse worker at AMZN are basically:
1. Know how to read
2. Be physically fit.
...which is a pretty low bar. You don't even need to be clever with your hands or anything, so sweatshops in Bangladesh require more skill. Meanwhile, the people building infra at AMZN are some of the most intelligent, highest skilled people on earth. And I'm sorry, but until we live in a post-scarcity economy, the former group is always going to get paid very little, and the latter group is going to get paid a lot. Nothing else is tenable. You can ignore supply/demand with Communism, but Communism clearly doesn't work in practice as long as there is scarcity.
Personally, I think UBI is a great solution to this problem. But the idea that AMZN is perpetrating an injustice by not paying unskilled, easily replaceable workers at anywhere close to the rate they pay highly-skilled, hard-to-replace workers is just silly.