Most European countries, including Switzerland, still have them. They do work with some limits. And they are absolutely necessary to prevent that, once you have made money, you can profit for the rest of your life including future generations.
If there is no form of weath + inheritance tax, a feudal society is unavoidable.
If there is no form of weath + inheritance tax, a feudal society is unavoidable.
Even if difficult, we'd better try.