And there is barely any difference in the proportion of rich people voting GOP or Dem. 1-2% in the 2020 exit polls. In 2016, Clinton had swings in her favour amongst the very rich, and larger swings against amongst lower income and POC voters. Not because they switched to the GOP but because she gave them no reason to turn out.
You’re projecting your ideal onto a party which relies on the very wealthy to fund their politics. And they can do that because it is how power works and why they do not want to challenge power.
Stop confusing the left with the centre. The necessity of the electoral coalition is precisely a result of power, and its ability to silence the left while pandering to the right.
“For every blue-collar Democrat we lose in western Pennsylvania, we will pick up two moderate Republicans in the suburbs in Philadelphia, and you can repeat that in Ohio and Illinois and Wisconsin.” – Chuck Schumer, 2016