Both. Just like many other political labels, they start out as one thing then more and more people start using the labels and soon their orginal meaning is lost and have become something else
This is caused by both advocates and opponents of the various causes, positions, and world views
I've got strong opinions and political thoughts on the term "political labels". Sure it once meant labels applied to politics, but now, who knows what it means? Both sides have misconstrued this term and now we shouldn't use it.
Dating back to 1824, the term social justice refers to justice on a societal level.[11] From the early 1990s to the early 2000s, social-justice warrior was used as a neutral or complimentary phrase, as when a 1991 Montreal Gazette article describes union activist Michel Chartrand as a "Quebec nationalist and social-justice warrior".[1]
Katherine Martin, the head of U.S. dictionaries at Oxford University Press, said in 2015 that "[a]ll of the examples I've seen until quite recently are lionizing the person".[1] As of 2015, the Oxford English Dictionary had not done a full search for the earliest usage.[1] Merriam-Webster dates the earliest use of the term to 1945.[6]
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According to Martin, the term switched from primarily positive to negative around 2011, when it was first used as an insult on Twitter.[1] The term first appeared on Urban Dictionary in 2011 and on the Something Awful forums in 2013.[7] According to Know Your Meme, the pejorative term "keyboard warrior", which describes a person who is unreasonably angry and hides behind their keyboard, may be a precursor to the "social justice warrior".[7] The negative connotation has primarily been aimed at those espousing views adhering to social progressivism, cultural inclusivity, or feminism.[12][1][2] Scott Selisker writes in New Literary History that the SJW is often criticised as the "stereotype of the feminist as unreasonable, sanctimonious, biased, and self-aggrandizing".[12] Use of the term has also been described as attempting to degrade the motivations of the person accused of being an SJW, implying that their motives are "for personal validation rather than out of any deep-seated conviction".[3][9] Allegra Ringo in Vice writes that "in other words, SJWs don't hold strong principles, but they pretend to. The problem is, that's not a real category of people. It's simply a way to dismiss anyone who brings up social justice."[9]
The term's negative use became mainstream due to the 2014 Gamergate harassment campaign ...
I postulate, labor justice is social justice.