In some country, there is a cap where if you have more than X wealth/income, it will bump your tax rates by several percent. It use to be the case in France. W

In some country, there is a cap where if you have more than X wealth/income, it will bump your tax rates by several percent. It use to be the case in France. With those kind of "for the super rich" taxes, it can be (depending on the implementation) more interesting to give enough of your wealth to charity to be under the cap.