https://thisecommercelife.com/blogs/comics/the-day-all-billionaires-died
I'm sure it's annoying for some to click offsite, but it's 20 panels long. IMO worth the read, though!
One of the purposes of science fiction and fantasy is to allow us to imagine a different world, without necessarily knowing how get there from here. In this case, we're imagining a post-billionaire world without worrying about how to get there from here.
If that world seems better than the one we have now, we could decide to put a long, difficult plan in place to get to that world.