Apresidential speechwriter who then took a job as a syndicated columnist and later returned as a domestic policy adviser to a member of congress illustrates

The revolving door

Explanation:

In politics, the revolving door is a term that refers to the movement of high-ranking personnel from the public sector to the private sector, and viceversa. In our example, we can clearly see this: a person holding a high-ranking public post (presidential speech writer) moves to the private sector (writing as a columnist), and later returns to the public sector again (domestic policy adviser to a member of Congress).

The revolving door is generally frowned upon by the public, as conflicts of interest may arise: people in the public may favour certain parties, expecting to be rewarded with a good paying job in the private sector once his term in public office ends; and conversely, people with vested private interests might take a public post, expecting to enact legislation or act in a way that will further their own private interests.

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