Not true. Making the company X amount or your out is thinking to linear. There are profit centres and profit eater departments. Keeping your job is more political than values based.
The idea of a "profit eater" department makes no sense to me. Sure, your IT department or janitorial staff or whatever aren't being directly handed money by clients, but your business would not be able to run without them. Surely they're only a negative profit center by a very myopic, naive definition of the term?
> but can your business earn more if had more of them?
But that's true of everything. If you hire 100% more salespeople (generally considered a "profit center") but don't also hire a proportionate number of extra devs and IT and janitors you're not going to make more money either.
Simplifying a bit, but there's "right amounts" of all types of employees - if you don't have "enough" devs/salespeople/support staff/IT/janitors, then hiring more will result in you making more money.
