IMO RMS already has the attitude of a billionaire. He’s a thoroughly weird man who says stuff he really shouldn’t then stands by it. He’s right about a lot of things when it comes to software, licensing, and open source in general but outside of that track he’s more than a little loopy.
I think it might be because he’s had to fight society so long for things he knew he was right about that now he doesn’t know how to have people tell him “no Richard, that’s ducked up”.
Anyhow, I don’t think him being a billionaire would be a good idea, him having enough funds to branch off into doing wherever strikes his fancy could be very bad.
And Linus, I love Linus but look at how he’s grown as a person and listened and changed how he interacts with other kernel developers. Would he still have been as receptive if he was a billionaire? Something tells me no.