It really is, though, about correcting cosmic wrongs, because it is the world view you must first hold to believe something "unjust" is occurring when someone voluntarily bargains to work long hours for lower pay to be able to work their dream job. The next step is to pass legislation or push for judicial or executive action to try to "correct" for the injustice. The U.S. already has several very counter-productive pro-union labor laws it has accumulated over the years, and, under democrat presidents like Obama and Biden, the NLRB rules heavily in favor of unions:

https://cei.org/blog/biden-says-he-wants-to-be-the-most-pro-...

https://www.nationalreview.com/2015/12/adversarial-labor-law...

These laws and actions don't make the world more just. On the contrary, they just add new injustices on top of the old ones: https://www.youtube.com/watch?v=xzYgiOC9cj4