Atypical restraint on compensation increases has been evident for a few years now and appears to be mainly the consequence of greater worker insecurity. In 1991, at the bottom of the recession, a survey of workers at large firms by International Survey Research Corporation indicated that 25 percent feared being laid off. In 1996, despite the sharply lower unemployment rate and the tighter labor market, the same survey organization found that 46 percent were fearful of a job layoff.
Regarding Noam Chomsky's words about Greenspan.
This is also mentioned in https://www.politifact.com/factchecks/2014/jul/21/facebook-posts/social-media-meme-says-alan-greenspan-said-insecur/