Except that the wealth of a country is not typically heritable, so I would say in the best case scenario (for him) he simply has temporary access to the resourc

Except that the wealth of a country is not typically heritable, so I would say in the best case scenario (for him) he simply has temporary access to the resources of the country, which he seems to be using for the betterment of that country. After he's out of office or dies, his children will get some preferential treatment and their connections and influence may be worth millions, but not billions or trillions. His children will not inherit all the oil fields in Russia. And it's not like children of Western leaders don't gain similar influence and connections.