There is, but it’s basically made up to support the notion that it’s very difficult to stay rich. It’s actually very rare for subsequent generations to lose inherited wealth, it just gets partitioned out so there are dozens or hundreds of rich people instead of one disgustingly wealthy individual.
Similar to lottery winners losing everything, it makes a much bigger headline when one loses everything despite it being incredibly uncommon.
Less than twenty years after the Catholic church formed “rat lines” to smuggle Nazis to South America to protect them from prosecution for their crimes against humanity.