You make a post this ignorant and then tell others to do research? Amazing. I worked at Walmart head office for years and I can tell you that vendors deal with Walmart because they have no choice. Walmart is a horrible place to do business with and various vendors quit them because of their behavior (e.g. Snapper).

And it's Walmart who hates unions. Their profit depends on exploiting human labor as much as possible, so they don't like anything that gives workers a fairer shake.