The same way every other union works... I don't get your question? The unions that do work, are not the ones you see on tv. When something explodes, specially a union, it gets massive coverage. When a union works, any achivement gets burried while the negative press is the only one given coverage(1, 2, 3, 4).

So, I will challenge the reader: unions win about 7 out of 10 elections to get certified/created. Does your mental image of labor news look like 70% wins? If not, ask why

1: https://www.benjnewman.com/uploads/1/2/2/1/122135844/kane_ne...

2: https://www.jstor.org/stable/10.7591/j.ctv3s8mwx

3: https://www.projectcensored.org/unions-won-more-than-70-perc...

4: https://www.mediamatters.org/labor-unions-and-workers-rights...

I agree in general, but this article claims that the unionized tech workers now have pay increases, cheaper health benefits, and layoff protections. There is also a discussion about the process. This article at least is not just "unions good" (waves hands).