insiderdom

From insider +‎ -dom.

insiderdom (uncountable)

1. The status of being an insider.
   • 2008 June 1, Jill Abramson, “A Nod to the Insiders”, in New York Times‎^[1]:

     The two senators have been tripping over each other to distance themselves from the taint of Beltway insiderdom.