If a wealthy person earns their wealth, then they have benefitted from their contribution to society. If they are allowed to lock that wealth up multigeneration

If a wealthy person earns their wealth, then they have benefitted from their contribution to society. If they are allowed to lock that wealth up multigenerationally, then they are incentivized to change the system to make it harder for others to do what they themselves have done, to the benefit of others who have also already taken advantage. Society as a whole benefits much more when each generation has to earn the bulk of their wealth.