When a company is successful, by which I mean it turns a healthy profit and eventually even enough to go public, it ends up sustaining a lot more employees doing a lot less than a smaller, leaner company that can’t afford inefficiency. That doesn’t matter much to the successful company, it makes more than enough money to cover the inefficiency, and the inefficiency isn’t causing any real trouble - it just means that…
I’ve had a lot of conversations over my career about this general topic, and I still haven’t been able to answer: If a large, successful company operated extremely cleanly, wouldn’t that increase stock price even further? What are the disincentives to doing so (beyond the need for requiring more from people)?
Executives are solving for their job, not for the company's success.