They were also poor. When unions happened, it was to get better pay and better working conditions.
In the history of America’s trade and labor unions, the most famous union remains the American Federation of Labor (AFL), founded in 1886 by Samuel Gompers. At its pinnacle, the AFL had approximately 1.4 million members. The AFL is credited with successfully negotiating wage increases for its members and enhancing workplace safety for all workers.
BTW, your asinine words about: “I believe a lot of voters see the social justice left, and by extension the Dems, as favouring the interests of minorities - ethnic and racial, as well as gay and trans people - over the majority. And far worse, prioritising the welfare of illegal immigrants, criminals, homeless people, and drug addicts over that of law-abiding American citizens who work and contribute to society.”
Do look really shortsighted as the union example shows, when unions came, other industries with no unions had to become better with their workers to keep them (and prevent the growth of unions) likewise, helping the needy leads to better conditions for all, not just the “people putting their own interests first”.
You are in reality defending the things that got us here, the denial of justice for minorities, women and others was here first, not what in reality does and will benefit all. Penny-wise but pound foolish.