Then any trusts that benefit you should be counted as part of your wealth.

So then the trust doesn't list you as a beneficiary but instead goes through a series of shell corporations that they don't control on paper. With stakes this high - your very child's future, there are always going to be people that are rich enough to break the spirit of the rules.

If it's a small handful of people, there's probably better things for them to spend time on, rather than trying to make an unbeatable system.