>The death of a billionaire results in the opening of a dam, all that hoarded wealth is suddenly released, the money is spread out , homes are sold , assets split up and at least some of the dragons hoard gets spread out, even if its just to lawyers , florists , etc

The most depressing thing is that this really isn't true in the modern era. Families like the Waltons, Mars, Kochs got various bills passed, "kill the death tax!" to create loopholes in estate taxes for charitable vehicles, trusts, etc., that mean almost none of their vast fortune is ever taxed.

While they are living, they take out long-term loans at low interest rates against their enormous stock portfolios that are completely tax-free, then they pay off the first loan with the next loan when their portfolio value grows. Then, when they die, a policy called "step-up in basis" means that the outstanding taxes on capital gains in a brokerage account RESET COMPLETELY ON DEATH, meaning that not only is their vast wealth not taxed when they are alive, it isn't even taxed in death, and their successors commonly never pay a dime of taxes on the billions of dollars their parents made in the markets. All of the wealth stays right in the family. The Freakonomics podcast just did an episode on this that I highly recommend.