This article re-raises a point that I tried to make earlier in the thread: Using testamentary trusts is not just about marriages and divorces. Several here have commented on how wise, trustworthy, beautiful, etc. their children are. This can all be true, but their assets are still in peril due to circumstances completely beyond their control like a judgment due to an auto accident.
Well, maybe it would be a good idea to talk about it. Hopefully your estate plan contemplates that he may predecease you. That is more or less the same problem. Have you designated charities as beneficiaries then? Maybe you and he ought to talk about what charities you believe in.
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Switching gears, I submit the the "controlling from the grave" meme is distorting the dialog here. Certainly it is possible to draft a trust that does exactly that, but there are many situations where a better meme might be "protecting from the grave."
The simplest case might be a special needs trust for a person who cannot live on their own. A direct bequest might result in his/her not qualifying for government aid that they might otherwise get, where a properly written trust can provide money that is supplemental. Depending on the person's mental ability, a direct bequest might also result in a court-appointed conservator being given control of the money.
In our case, "protecting from the grave" means that our son will not receive a seven figure bequest that he has no idea how to manage. He would not be a spendthrift; we don't worry about that, but he is a very open and trusting soul who would be very susceptible to salespeople that he should not trust.
In the case of our grandchildren, "protecting from the grave" means encouraging them via financial carrots to go for as much education as they can while, at the same time, protecting them from the sort of natural spendthrift urges that come from being young.