Reminds me of rent-controlled housing (in San Francisco). Once you're in, you have to do (i.e. pay) a lot less than the going rate, locking up spots indefinitely.
I disagree with the article, it's quite easy to move countries actually.
Real (not estimated) figures for 2011 and for 2012 & 2013 would be shocking (there have been a lot of firings of non-permanent workers).
Those graphs do not tell the stories that he claims they do. Or at least, not without a lot more explanation than he gave.