That's just not how their business model works. They charge a fixed per-employee fee every month. For benefits they give you a quote each year when policies renew and then you decide what you want to do.

Their health insurance rates have doubled and tripled for some customers, because our national system for health insurance is insane, and they just tell you that when the renewal comes up and you decide. I'm a customer, I've seen this first hand.

Your comment just doesn't really make sense. It's like wondering if a travel agent is going to "face the choice of eating some of the cost" when hotel rates go up or airline tickets get more expensive. The answer is no, that's just not how the pricing model works.