For the Netherlands it is a very easy answer they have all their wealth in companies which can be transfered almost tax free to their children.
Buying an estate with a special status in combination with a foundation also allows for additional tax planning since those estates are tax exempt and so are gifts.
Internation tax planning by using shell companies are outdated and impossible for Dutch residents, the tax authorities have become too advanced.
With the 30% ruling you can opt to become non resident for the wealth tax