I keep going back to a WS'er saying that the Savopoulos' weren't "that" rich. These people were paid. That private jet is niiiiiice.
They were pretty rich. And smart, in that they put most of their wealth, including homes and plane (before selling it), boat, etc., in trusts. They didn't personally own any of that stuff, although as trustee of the trusts, they would control it. Again a perfectly legal tax maneuver. People have to have a certain amount of money and knowledgeable advisors to take advantage of these financial instruments. The tax savings have to be greater than the cost of setting them up to make them worthwhile.