Bush revokes wage rules: A questionable move

I just a read about how President George W. Bush has recinded part of the 1931 'Davis-Bacon' Act which requires the federal government to pay workers at least the average or 'prevailing' wage in an affected area. In this case we are talking about the area hurricane Katrina devastated. So, not only are these people homeless, but President Bush has now given them a pay cut. I find this move questionable. Why impose lower wages on the people of an area already in need of assistance? I might add that Haliburton and large corporations are rushing in for non-bid rebuilding contracts. Is this a case of the rich get richer and the poor get poorer? What good can come from imposing a pay cut to an impoverished region? I give the President the benefit of the doubt, as I am sure he has the nation's best interests in mind. Anyone know anything more about this or have an opinion to share?