The outlash against oligarchs has almost nothing to do with tax dodging. If anything they pay many thousand times more than they consume in public services (they're not even in London the whole year and the property tax alone on one penthouse is probably more than the average person pays in taxes in a decade). It is more about sanctions right now than anything. This paper promotes the "facilitators" idea that if we could just eliminate a few key offshore providers we could stop the oligarchs right in their tracks. They have some nice theoretical calculations and visualizations that justify this. I think in the real world the outcome would be very different because there is no reason to think that a 1000 more "facilitators" wouldn't pop up wherever the new cool jurisdiction is. Are we really expecting the whole world to leave trillions of dollars on the table?