I'm unsure ttt. In a way, Inheritance is automatically unfair, it means rich families remain rich (above what they could ever physically need), while we still struggle with NHS, homelessness, disparity...
However, people who work hard, also often have a motivation, to look after their families, etc, which shouldn't be discouraged, either.
My dad died in France. And there, they have to give a certain percentage to blood children. Which makes some sense. But also, depends on the amount of money involved.
No individual needs billions.