http://www.antiwar.com/paul/?articleid=2742 (it's authored by Ron Paul, but still)
...
There are those who say that the power of appointment is necessary in order to preserve checks and balances and thus prevent an abuse of executive power. Of course, I agree that it is very important to carefully guard our constitutional liberties in times of crisis, and that an over-centralization of power in the executive branch is one of the most serious dangers to that liberty. However, during a time of crisis it is all the more important to have representatives accountable to the people making the laws. Otherwise, the citizenry has no check on the inevitable tendency of government to infringe on the people’s liberties at such a time. I would remind my colleagues that the only reason we are reexamining provisions of the PATRIOT Act is because of public concerns that this Act gives up too much liberty for a phantom security. Appointed officials would not be as responsive to public concerns.
Supporters of this plan claim that the appointment power will be necessary in the event of an emergency, and that the appointed representatives will only serve for a limited time. However, the laws passed by these "temporary" representatives will be permanent.
...
Last month, this body fulfilled its constitutional duty by passing HR 2844, the Continuity of Representation Act. HR 2844 exercises Congress’s power to regulate the time, place, and manner of elections by requiring the holding of special elections within 45 days after the Speaker or acting Speaker declares 100 or more members of the House have been killed. This proposal protects the people's right to choose their representatives at the time when such a right may be most important, while ensuring continuity of the legislative branch.