> Highlighting the point, there was a delicious snippet in last year’s PBS documentary, “Park Avenue: Power, Money and The American Dream,” which drew on material from Gross’ book. A former 740 Park Ave. doorman dished to director Alex Gibney about the most tight-fisted residents and dared to name names.
The worst offender was oil baron David Koch, co-founder of Koch Industries, who has an estimated worth of $36 billion.
“We would load up his trucks — two vans usually — every weekend for the Hamptons . . . multiple guys, in and out, in and out, heavy bags,” said the employee, his face in …