I've seen it, too. Worse yet is when it's the kind of company that doesn't allow mediocre employees to improve. They're just given more work, crazier deadline

I've seen it, too. Worse yet is when it's the kind of company that doesn't allow mediocre employees to improve. They're just given more work, crazier deadlines, less input, and no opportunities for advancement. Not only does this hinder the company, but it harms employees who stay too long at these companies. But the companies don't care because, by the time the good employees have left, they've made their money and enough wheels are in motion that the cash cow will continue to produce in the face of mediocrity.