https://www.forbes.com/advisor/personal-finance/average-income-republican-vs-democrat/
It doesn’t answer the median question, but lower income households identify with the Democrats by 58-36. Upper income voters also favor Democrats, but only by 53-46.
The picture of Republicans being the party of the poor relies on a picture of the poor that only includes rural white people.
A lot of poor and uneducated people don’t need help understanding that vaccines are real and helpful. Everyone has exposure to the literal health experts in their community (doctors) who recommend them.
I’m not even sure what you’re thinking the wealthy urban educated could do that literal face to face doctors have failed at. The problem is the politicized misinformation that’s served up by algorithms and convinces idiots of all education and wealth levels that their doctor is part of a 5G conspiracy to give their kid autism. RFK never lacked in wealth, education, or engagement from rich educated urbanites.
The Masque of the Red Death seems appropriate given how often sickness runs rampant on the closed society of a cruise ship.