In the process whereby financial reform legislation made its way through Congress after the financial crisis of 2008, the U.S. House and Senate had different approaches concerning who would be required to go through a clearing house to buy or sell derivative securities. According to Michael Masters, "The clearing house would stand in the middle of the transaction and guarantee both sides of the trade. If one counterparty to the transaction fails, then the central counterparty absorbs those losses, protecting the system as a whole from collapse." Masters claims that "Wall Street firms hate this idea because their prodigious profits will dwindle when derivatives are traded in the light of day, letting their counter-parties see the true costs. So Wall Street is pushing hard to exempt as many transactions as possible." Given the culpability of Wall Street in the financial crisis, they were in no position to "push hard." That they did nonetheless is a telling sign of the underlying character, or lack thereof, "on the street." Furthermore, that the representatives and senators were listening to them ought to cause the voters some concern. Yet because of the reality of the banks' muscle on the hill, the power of the banks to exploit any loopholes in the final legislation should have been salient as the legislation made its way through Congress. This can be seen in whether to favor the House or Senate version.
The full essay is at "Wall Street's Influence in Congress."