Most importantly, there are very few managers and business leaders who think "You know what would make my life easier? Having a lot more people to manage!" The usual reason people are hired is because the needs (or anticipated needs, which can often be wildly off as we've seen recently) of the business require it, and without more people there will either be lost business opportunity or risk that existing employees are working at an unsustainable rate.
I'm definitely not saying that businesses can't be inefficient, but when I read your sentence "Everyone’s number one objective in any company is to make their individual life easier" (with a "full stop" no less as if that somehow guarantees its unassailability), I honestly didn't know what you were talking about.