What are the motifs in Total Control by David Baldacci?

Few people truly understand the function of the Federal Reserve Board in America. At one point in the book, Baldacci attempts a simple explanation of its functions and, in so doing, points to its undeniable control over the county's economy. Because the Board Chairman has the authority to unilaterally alter interest rates, moreover, one man, in fact, can impact the entire nation's financial health. In the fictitious world of the novel, Arthur Lieberman, as Fed Chairman, succumbs to blackmail and alters rates as instructed by his blackmailers.