I mean, sure, she probably has bought herself perhaps an extra year or two with more advanced monitoring than most would get, but I don't think they have any unknown secret treatments for the elite besides the ability to more easily get into unknown untested experimental treatments if need be.

But really, it just comes down to the fact the rich can buy the best healthcare are much more healthcare than an average person (eg, private doctors that can check them weekly), not that they have anything secret.

Again though, the diminishing returns of such things cannot be understated since no secret treatment for the rich exists.

Also; RBG is only 87, and her health issues are on par with someone of that age in the general population. I mean, ya, 87 is old, but it's not really statistically extraordinary either. Im sure there are plenty of 87 year olds in the general population who have less health issues than she does.