Health insurance costs the company money too, it’s why United was so popular, it’s cheaper for the company. If they raise their rates, the company has to foot part of that bill. Normally 50+% is covered by your employer. That’s why it is so much cheaper to get insurance through your company than going market. So if United raises rates by 25%, your employer is as pissed as you are. What your employer might not care about(if you are in a big company) is things like denial rates or employee experience.
The Working Families party appears to be legit. Adam Conover did an interview with one of their organizers and it really felt like they had the right ideas and were building the right tools to give power to the people, while understanding the system as-is is stacked against what they want.
https://headgum.com/factually-with-adam-conover/a-third-party-that-actually-works-with-maurice-mitchell