No, on several occasions, an upper class minority has been able to convince parts of lower classes to behave against what you think their best interests should be.
> I mean, they keep convincing a significant part of the population that accessible health care is bad.
Look, I understand that a lot of people on this forum think that there's one and only one way to achieve accessible healthcare, but the reality is that there are SO many different ways to get affordable / high quality care. Singapore, Switzerland, the UK, Denmark, Germany, and the Netherlands all have wildly different healthcare systems, but all produce fairly good outcomes (especially Singapore).
I'm happy to talk more about all of them: I write software for claims processing systems for a living and can tell you all about how healthcare pricing works.
What you're witnessing is that there's broad agreement around what the problem is, but violent disagreement on what the solution ought to be.
What is spent during campaigns is just the tip of the iceberg, and is a tiny drop in the daily deluge of propaganda. Look at the media landscape in the US. Private interests such as the Murdochs, Robert Herring, and whoever controls the Sinclair Broadcast group drive the narrative and the constant brain washing. I mean, they keep convincing a significant part of the population that accessible health care is bad. You seem to assume that people are rational and not easily influenced. They are not, and they are.