In some or perhaps most of these cases this is probably more about managing finances than anything else, but a company has at least a theoretical direct stake i

In some or perhaps most of these cases this is probably more about managing finances than anything else, but a company has at least a theoretical direct stake in its employees. At the risk of sounding blunt, they incur the cost of having to replace them and the lost productivity in the mean time. If the employee is, say, the lead developer at a startup then having insurance on them might be the difference between the company being able to hire a replacement or having to fold.