If those people control everything that means they also control the government. So if the government took a big hunk of inheritance they would control that also.
We don't need the government to take people's money just because we don't think they deserve to be rich. I haven't seen government make very wise use of the money they do collect. And if the wealthy are "buying politicians" the politicians will just use that money to benefit the wealthy. It is better going to their children who will spend it to create jobs that continue to benefit workers.
It is the battle. Roosevelt saw the dangers from the inside, he was a very rich man from a wealthy family and passed the inheritance taxes. Since then the wealthy have fought like hell to get rid of it. You know why they want it gone. I cannot understand why the average guy wants to build an aristocracy.
That is not what they do with their money. They buy politicians, lawyers and other powerful people to help them live even better and more powerfully. Look at what Kochs do with their money. They are doing great damage. The rich never have enough money or power. https://www.cbpp.org/research/feder...ey that,would otherwise go completely untaxed.