Actually, the loss of any employee causes some expense. What I don't quite get is why WM would want to pay these premiums.
It may seem morbid and it might look a bit bad if insured parties start dropping like flies but it looks to me like an economy of scale investment/tax deduction plan and not anything sinister.
I don't know about Wal-Mart enough to comment but I do know enough about trial lawyers to know whose side I generally am not on.
Why is this different than corporations paying huge KeyMan policy premiums of which the Company is the owner and beneficiary?