I work at a company that was in bad shape during the financial crisis. A temporary CEO was put in charge. Ultimately, a number of companies were merged to create one company that could survive. In the end, one of the CEO's of the merged companies became the CEO of the final company. His first act as CEO was to offer everyone in the company a tenure-based package to leave the company. I don't know the full numbers, bu…
This reminds me quite a bit of a blog post from The Wetware Crisis on what he deemed The Dead Sea Effect ( http://brucefwebster.com/2008/04/11/the-wetware-crisis-the-d... )
While not a forced evaporation which you describe, its the 'the best people can get jobs elsewhere' and 'the less capable people entrench themselves as experts on critical systems to where they can't afford to be let go'.