> It is a huge expense, so why would we not shop around?
Because switching to a different provider can be a huge pain in the ass to your employees, whose multi-year treatments/doctors/etc may suddenly become out of network?
And it's probably not worth doing unless the cost delta is truly staggering?
> Will my workplace ever switch their insurer provider of choice? Almost certainly 'no'.
Why not? I am an employer and we evaluate the cost of health insurance every year. It is a huge expense, so why would we not shop around?