In my will I have left each beneficiary a % of my estate. This allows for inflation distorting the values of different assets. Also, you wouldn't want to leave one beneficiary your shares in Wynard Capital and another your shares in Auckland Airport as a rough example. If you set up a Trust you can write a Memorandum of Wishes for the future Trustees as to how you would like your Trust's assets handled. The Trustees of said Trust are under no legal obligation to follow your wishes. I also am not a believer in ruling from the grave. However, I don't think beneficiaries should receive bequests at a young age excepting for educational purposes.