How do those rich immigrants avoid taxes?

There are still many ways to avoid taxes. For example, it is possible that someone in the family has no identity, so the property will be transferred to him, so the past assets can be explained by gift, and the donor does not have foreign identity, so he does not have to pay taxes. Also, if the assets are very large, you can do a trust, do not have to pay taxes, and set up a foundation and so on.