I think you would be surprised to learn that most would not even want to talk to you, they just want you to shutup and drive so they can fiddle with their phones in peace. Besides, even if they were open I can't see how the novelty doesn't wear off really quick, you'd end up hearing the same themes over and over again.

I suspect you've not known many rich people. Most that I've encountered are spectacularly dull, isolated, and self-centered.

Also, if they've hired a chauffeur, it's because they've decided that the time they'd otherwise spend driving is better spent doing something else... And that something is almost certainly not talking to "the help". Unfortunately.

I assume that would get boring fairly quickly. And all the negative aspects of listening to those sort of people would get more and more annoying as well.