Naked Capitalism has the article The Augean Stables – How Corruption Has Amended the Constitution. The article is a discussion of Gary Hart’s Time Magazine essay Gary Hart: America’s Founding Principles Are in Danger of Corruption and his new book The Republic of Conscience.

Here are some excerpts of quotes from Hart’s book.

[T]he largest [lobbying “predator” (his term)] by far is WPP (originally called Wire and Plastic Products; is there a metaphor here?), which has its headquarters in London and more than 150,000 employees in 2,500 offices spread around 107 countries.
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According to Mr. Edsall, WPP had billings last year of $72.3 billion, larger than the budgets of quite a number of countries.

This reveals the magnitude and concentration of lobbying on a scale that I could never have imagined. The fact that it is not centralized to one particular country is also shocking. The way this has changed the form of our government, if not shocking, may be more profound than I had imagined.