It’s a good read, though it mostly poses interesting questions and offers no moralizing (answers) of its own. This, one might argue, is why it’s a good read.
As for my commentary on the article…no, on the question, I would say this: is there any “invention” that even comes close to the (relatively free) market in terms of helping people across time and around the world? Put differently: I would argue that the market has helped more people more than any other invention, concept, or idea in human history. Put again differently: the question should really be, is there anything immoral about capitalism*?
* – and I want to be clear that here I am referring to absolutely free, laissez-faire capitalism, not the thing that the US is currently saddled with.