When you have six figure employee numbers, the internal tools have more users than many startups do. You start to find that off the shelf tools don't work any more and you need to have people customizing them. Then you start seeing things that are specific to the company - people walking too far to get to conference rooms, and someone staffs up a tool to optimize meeting room allocations. You end up with tons of people working on things that are invisible to end users just to keep the machine running.