As much as Cal shoulders a lot of blame, he cannot control his boss and his boss's boss. An example would be you going to your boss, and saying, "Hey, I found a good person to join our company." Your boss says, "Great! We will start the paperwork." He sends it to HR, and HR finds a small gap in his work history that would normally cause no issue. HR says, "No, no acceptable." You go back and forth with your boss and HR and they won't budge. You mention it to CEO and he just doesn't want to get involved. Dude gets tired of waiting and goes to another company. Was it your fault the guy didn't get hired or the company as a whole?
Sometimes bureaucracy will screw you. And it certainly did here. Now, you can say, "Cal didn't have enough good will." And that's probably true, but in this situation the true ass is HR (or UK's Admissions)