An interesting point. To carry it to a further extreme, can a corporation citing religious prerogative claim tax exempt status? As long as the can demonstrate an apolitical approach to their business and thus not get confused for a political entity, why not?

It's because churches are charitable nonprofits, right? Plenty of nonprofit corporations exist.

Another issue: are the employees of every business required to adhere to the values imposed by their employers?

This doesn't seem to be an issue of what these employees do off the clock, although that's ultimately a very different discussion regarding contracts and reasonable job expectations and such.

It would seem if the answer is "No," that disallowing employees contraception would be an infringement of the First Amendment far more than what the lawsuits are claiming.

Perhaps, but these employees aren't being denied contraceptive, they're merely being denied contraceptive coverage as part of their insurance package.