Is there any secret here? Project managers have recognized the fact that the problem with labor is NOT a shortage.
Note the problem is articlulated well in this comment from a major news source.
http://www.businessweek.com/magazine/content/07_15/b4029050.htm?chan=rss_topStories_ssi_5
And worldwide, millions of people still can’t find jobs. The strongest evidence that there’s no general shortage today is that overall worker pay has barely outpaced inflation. In the U.S., the share of national income going to corporate profit, rather than, say, labor, is hovering around a 50-year high
So while profits are up at an historical high, people are being driven into poverty. Not because they aren’t willing to work but by GREED!