Honestly, this is exactly why inheritance should be taxed to hell and back.
I truly understand the idea of wanting to make sure your family is looked out for after you're gone. However, if governments gave a shit, about making their country truly great and something to be admired by the rest of the world, they would put the well-being of all of their citizens first and foremost by creating a social safety net that would never leave your family destitute if something happened to you.
If I die there should be no concern of who will put food on the table, or make sure my family has access to healthcare or an education in any developed country that claims greatness. Especially not one producing the kind of disgustingly oblivious bottomless pit levels of wealth responsible for some of the most justifiably hated villains in history.
If only there was some system that could allow you to pump money and resources back into your country's economy without quid pro quo private donations and business deals for public contracts...

Obviously this applies in particular to the U.S., but favoring policies that harm the many in order to help the wealthy few preserve the resources they have hoarded and obtained by exploiting others, seems to be spreading like an STD beyond the borders to many other countries that should clearly know better.
Economic Inequality Seen as Major Challenge Around the World

It's hard to say if it was ever really anything exclusive to the U.S. or if we just copied somebody else's idea and super sized it.
The Richest Man in Germany Is Worth $44 Billion. The Source of His Family Fortune? The Nazis Know.
Dark Money: The Hidden History of the Billionaire$ Behind the Rise of the Radical Right
T.L.D.R.: Inheritance tax would mean people like Elon Musk and Donald Trump don't exist. Likely Peter Thiel too, to a lesser extent, and there would be no need to worry about leaving your family a safety net because those taxes would go towards creating a safety net that ensures the basic needs of all citizens are taken care of.