Comment by wpietri

The article is pretty clear. They allow "families to pass wealth from generation to generation, indefinitely, without estate taxes at each death". Significant estate taxes are important to a democracy to prevent the rise of a noble class. Even Britain, whose system of inherited wealth and power America's founders were desperate to avoid emulating, now has a significant estate tax: https://taxfoundation.org/downton-abbey-and-death-taxes/