Rupert Murdoch in secret legal battle with children over media empire

i.e. the trust can many times be changed via consent of the beneficiaries, the primary lever that Murdoch has to get beneficiary consent is other forms of assets that are not under said trust (ex: each child get 25% of this asset, without consent that can't change, but if there are many other assets, the benefactor can basically say, if you don't play ball, you won't get anything from the other assets, depending on the size of the other assets, that can be very persuasive).