But obviously most ownership is a simple two node thing with a single directed edge connecting the nodes. These are simple to decide if they are legal.
Tax raids are often a symptom of such legislative tradition where laws are written so as to allow authorities to apply loopholes to get their way (as opposed to loopholes for citizens or companies). In my country (Finland) there are practically none, and the tax collection procedure is very effective. This amount of control comes at a price, of course; regulation is predictable but there's a lot of it (and recently the development has been towards more and more rapid and unpredictable changes, often somewhat to do with how to apply EU regulations).