US presure groups: revolving door

I have been doing some legwork for a forthcoming article for first past the post on campaign finance in the USA. Browsing the Open Secrets site I have been fascinated by their feature on the revolving door.

As the site states:

"Although the influence powerhouses that line Washington's K Street are just a few miles from the U.S. Capitol building, the most direct path between the two doesn't necessarily involve public transportation. Instead, it's through a door—a revolving door that shuffles former federal employees into jobs as lobbyists, consultants and strategists just as the door pulls former hired guns into government careers. While members of the executive branch, Congress and senior congressional staffers spin in and out of the private and public sectors, so too does privilege, power, access and, of course, money."

On the site you can track movement between congressional and executive offices and lobbying firms. The scale and degree of activity is quite staggering.

This is an excellent site for consolidating knowledge on this much discussed, but often misunderstood phenomenon. Note for instance, that lobby firms seek to attract those with agency/executive experience as well as congressional staffers, not just ex-congressmen.>