HP is particularly dumb in this area. My personal acquaintance with this was with their strict "up and out" policy that was in effect several years ago. A decade ago I had a secondary responsibility of supporting a legacy DEC terminal environment.

The crew supporting it were HP badged guys not making alot of money, but being billed at some wacky rate. Never heard from HP hq until some VP of something flew in to tell me the whole crew was being laid off due to not getting promoted. (Keep in mid they were easily clearing $2M a year in profit)

Long story short, they all left, started a little consultancy and were able to win a bid at half the billing rate that 3x their take home.