You're right, because that's where the money is. But with a conservative court, and constant lobbying of Congress, not a stretch to see down the road that the onus is put on the employee, rather than the company, if the company can prove it was irresponsible employee behavior that caused an accident. It's always about the money when companies do stuff like this. They aren't spending serious money just because they want to intrude on an employee's privacy. Bad employees often cause them a lot money, and they want to root out any who might. Or protect themselves in litigation.