It's really not at scale. It's on the order of 500$ a month per dev for "gold" level care for a company of 50 people. I'm sure it's less the larger you get.
It might depend on the state and the age pool but I have to pay a percentage and based on that it's more like $10k/year. So you are almost 2x undercounting
... But maybe if the average employee of a company is 25 they could get a better deal