As a company grows (in size and age), there is definitely more waste and more bureaucracy. No impact in trimming that. But, larger, older companies also spend a lot of effort on defending their business or uncovering future business. Fire the people who do that, and you won't see any immediate impact to revenue or core metrics... But, you've probably reduced the future viability of the product (lower chance of uncovering new growth, higher chance of being disrupted by a competitor, etc).

You can see this a lot with companies bought by Private Equity firms. They slash costs and save a lot of short-term costs, and all looks good, but the company is now on a path to death.