Maybe I sound like a one-note Johnny beating to death this issue of illegal alien "cheap labor." But, I believe, when President Bush tells us we need to keep our back door wide open because "there are some jobs Americans will not do," he is acknowledging a profound lack of faith in the free enterprise system and the law of supply and demand. Putting aside for the moment all of the policies of the federal government designed to artificially inflate wages – such as minimum-wage laws, high taxes and wealth-transfer schemes – why are the wants and needs of agribusinesses...