The Peace Corps is a perfect structure for the CIA. It provides a point of contact with the working class which is so necessary for information gathering. And, because of the Peace Corps structure, the CIA does not have to control it in order to use it successfully.
They work with them, observe their customs, their way of life, their traditions. And then they draw up work reports describing their experiences.
It is not necessary to have many agents in the Peace Corps -- just in the right places and with access to all the information which is generated. Unknowingly, thousands of U.S. youths, most thinking that they are helping people, are instead gathering data for the CIA.
Those agents in the Peace Corps who are conscious of their role have several tasks. As they mingle with the people, they are identifying future leftist leaders as well as those right-wingers who in the future would work for U.S. interests. They are assessing consciousness, evaluating reactions to reforms. And they are selecting and training future agents.
Example:
Latin America, Chile, 1970's:
The Peace Corps was used as a front to get paramilitary equipment into the country. Ellis Carrasco, as head of the Peace Corps, was himself accused of gun-running. Later, the U.S. Army donated and installed radio receivers in all Peace Corps regional offices to facilitate communications. These same receivers were used during the coup to facilitate coordination of the Junta's bloody activities.
http://www.siccness.net/vb/showthread.php?t=68798