^^ That, and also the fact that mayor Bloomberg is very close to her could help.
Anna's influence goes beyond fashion these days. You just dont raise millions of dollars in one night, because you are at the top of Vogue.
She was also recently invited to be a voting member of the board at the Metropolitan Museum of Art. And the costume institute is not the only reason. Compared to their massive collection of art, the exhibitions Anna helps putting up are insignificant, so that must mean something.
On a personal note, I admire her figure a lot. Nobody has ever been as influential as she is in this industry. Of course the fact that she could be close to retirement makes us wonder who (in plural) could take over her responsibilities: the CFDA, the Met, of course Vogue, and whatever else she does