While the article is accurate in it's assertion that these jobs will not come back, it places the blame on the economy and "evil" corporations who are laying people off and replacing them with technology.
What the writer fails to acknowledge (it is the NY Times afterall) is that this Federal Government has been an enemy of the low-skill job creators for 40 years. By driving manufacturing off shore through over-regulation, over taxation and over-protection of the labor unions, they have created the environment where there will be too many low skilled workers available for too few jobs. Add the illegal immigration issue to this and the picture becomes more dire.
Many of these people simply become part of the dependent class who will then vote against anyone who threatens their lifeline to the federal government.......
In a Job Market Realignment, Some Left Behind - Yahoo! Finance