The only way to create wealth is to give most of it (>50%, at least) away. You have to provide more value than the price of what you're providing.
It is a very good thing, for society, for you and me, that that wealth is created. If the rich ever "stop accruing an insane amount of wealth", that would be very bad. We don't want that. We want that wealth to be created.
And then there's the obvious fix: just have the government do it all. The problem with that is that it takes away the wealth creation motive and replaces it with raw power. The point of business, at that point, becomes advancing it's management position in the government, not to serve anyone. I very much prefer a lot of highly capable people working to provide more goods for me cheaper & better to a lot of highly capable people working to provide a tighter and more controlling government. So should you.
The truth is more likely that their wealth has made them selfish and insensitive. As Leona Helmsley famously said "Only the little people pay taxes".
It might be interesting to know what percentage of thier offspring the wealthy are sending to fight and die in wars compared to everyone else.