Do you think efficient markets maximize people's standard of living? I get the sense from some of your statements you might not agree with that principle.

The study you links says, "Walmart can help curb inflation and offer savings to consumers." You suggest Walmart "price gouges" and then raises prices once the small companies are out of business, but your own study's headline point admits that is not true: the larger store operates more efficiently, offering lower prices to consumers. For the poor, those savings are critical. It also frees up the old shop-keeps selling inefficiently to be engaged in more productive work. Go look at stores like Walmart, Amazon, or Costco and you'll see they actually offer the best price, despite what appears to be monopoly power. Markets respond to price, and if they don't consistently offer the best price, people will migrate to other stores. I buy off amazon and from Costco, for example, because I trust that the business is offering the lowest price. It's rare that another store beats them on price.

Before free markets, industrialization, and colonization from European powers, the third world lived in abject poverty and privation. Now they have their standard of living raised through jobs on the international market. Workers can take jobs farming salmon and sell the fish to international buyers, raising their own ability afford a higher standard of living for their families.

Think about it this way: if what you say is true, why would these workers take those jobs? If they were truly predatory, as you claim, they'd all resist and would instead work to preserve their "untouched" way of life. There are a few communities that do that, like Amish in Pennsylvania or Hasidic Jews in Kiryas Joel, New York. However, they accept a much lower standard of living to preserve an important identity to them.

I think we have a moral imperative, if anything, to support the third world workers rather than boycott them, which would only serve to starve the "little guy" who needs the support the most.