labor - More on the shortage of migrant labor

The Asian Labour news has been digging up some more articles on the sudden shortage of migrant workers, especially in Zhejiang and the Pearl Delta. Western media seem to have been missing out on this development that already started after Spring festival.
When the famous economist Joseph Stiglitz dismissed recently the talk about the overheating of the Chinese economy, he did miss crucial information on the current shortage at the labor market, one of the three indicators of an overheated economy. Then way to get workers back is of course by raising their income, increasing inflation, a second of Stiglitz' criteria.
Some of the reasons mentioned for migrant workers to focus again on agriculture is one of the key new policies of president Hu Jintao, the focus on the well-being of the farmers. I guess he did not wanted to be that successful.