Those who are members of both the mafia and the professional sector—financiers, entrepreneurs, politicians, lawyers, doctors—are not so much producers as consumers of protection: they are internalized customers occupying social positions which allow them to pay handsomely for protection.

DEFINE: Clarifies the conceptual distinction between mafia members who produce protection and professional members who are 'internalized customers' consumers of it.

Diego Gambetta, The Sicilian Mafia The Busi…, loc. 412