Re: Workers defending their territory; managers afraid to challenge them.
Given the chance, most of us will defend the systems we maintain (and by extension our jobs): it's human nature.
I had a tour around the Mercedes engine factory in Stuttgart a few years ago. Our guide proudly told us that they'd never made anyone redundant since the 50s and it meant that employees were encouraged to suggest ideas that would mean they'd need fewer people without worrying about their jobs. If more companies took their attitude then who knows how more efficient they'd be.