Because they did not have the technology to resist without getting killed
The answer is: The "Beltway mentality" is a desired goal of every presidential administration.
The "Beltway mentality is an American idiom used to describe matters that are important to interest groups such as officials of the U.S. federal government, lobbyists, and the corporate media. All these groups are found within an imaginary beltway around Washington DC. If a president´s goal were to act with a Beltway mentality he would not tend to the needs of the population beyond this beltway, therefore this would not be desirable.
