There are compounding productivity boosts available when a team can all trust each other to basically never cut corners or make sloppy mistakes. Removing a tenth team member who is not up to the bar of the rest of the team can make the remaining 9 members each more than 11% more productive.
Of course, this strategy has its downsides. You can't ever hire juniors. You can't really hire people in and train them up at all, because everything has been built under the assumption that only experts will ever touch it. This makes an organization that operates like this inherently parasitic to the industry, only capable of hiring in experienced employees from other companies.
Of course, this strategy has its downsides. You can't ever hire juniors. You can't really hire people in and train them up at all, because everything has been built under the assumption that only experts will ever touch it. This makes an organization that operates like this inherently parasitic to the industry, only capable of hiring in experienced employees from other companies.