Borrow money isn't the right word. They're not creditors, they hold equity. They're the owners Musk is dismissing. The point of these calls is to make sure the executive officers are being held accountable to the owners of the company with thier money Elon is managing on their behalf. It was a PTA meeting and Elon Musk was being a petulant child who doesn't think he should have to do what his parents tell him.