No idea, I'm afraid but it's not surprising; that's what insurance seems to be about these days. (Remember PPI?!) Huge amounts of your premium will likely disappear with commission even before your hard earned ia pplaied to buying cover.
Are you considering it for any specific reason? If you are hearing rumours about your employers maybe looking to shed jobs, that could well be an exclusion.
What are the premiums and what could you get out?
Obviously it may work for some but I know it's been said in relation to motor warranties that if you put the amount of the premium aside every month (in a bank account rather than taking out a policy) then it's highly likely you will be better off.