According to this paper it looks like 8% of the world’s wealth resides in tax havens. If you’re looking to hide your wealth and launder your income in a tax haven the paper provides a nice big picture over view. For example 60% of the deposits in Swiss bank accounts are held by sham corporations registered in tax havens. Corporations that exist entirely to shelter wealth from the eyes of their countries tax authorities.
This hidden wealth is large enough to create large anomalies in plant’s economic statistics. The planet as a whole runs a trade surplus! Of course maybe we are exporting stuff from another planet. It has been suggested we could fix the economy via an alien invasion. I think we may have found our aliens.