Yes, it is a very flawed analogy made more outrageous by all your assumptions about motivations. The simple fact is an employer should be the one deciding what is in any compensation package they offer their employees, and if they choose to offer no package other than pay, then that should be their choice. And if someone wants to work for a company that has fewer benefits and more pay, then that option should be out there. And if you don't want to work for a company that doesn't offer free plan b pills, then don't.Another apples to oranges.
How about this: Your employer has a groupon that you can get discounts on many types of AR15 mags, including GI metal and PMags. Well, a law is passed (by someone your employer really doesn't like) that, among other things, says that employers should not restrict certain aspects of a groupon that you buy into. But now your employer has a fit because this law was championed by somebody they didn't like, so suddenly they decide that plastic mags are a crime against Baal and decide to change the groupon. So they sue to be able to exclude specifically PMags and TD Battlemags (but ProMag plastic mags are ok, because nobody's really heard about those. It's the PMags that everyone's heard about and made a huge deal over) from the groupon that you pay into.
So, you have an employer using an ostensibly religious rationale to alter a service that you pay into for a product that has zero affect on them, all because somebody they don't like passed a law. As a lowly AR15 owner, sure you can just make do with some crummy GI mags, but that's not the point. Your brother's employer decides that *all* plastic in relation to firearms is an affront to the great Baal and further drop groupons that have anything to do with plastic, including plastic receiver pistols like Glocks and even plastic rail protectors. But you, who is also a paying customer of this groupon, don't matter? The company, a faceless entity, can now dictate your groupon? So now what? Do you leave your job and find another one? Let me know how that goes, especially in this economy.
Not a perfect analogy, I'm not making that claim, obviously your magazine composition is not nearly the same as a medical service, but I hope the point is clear.