I actually use the churches words when they hired me back when, They said it was part of my pay. Today, I also help in negotiations with my current employer. They too refer to it as pay. So, I see nothing I state concerning this only my personal opinion.
Yes, I worked for Several years at a Catholic hospital in Iowa City Iowa. But, you don't have to take my word for it:
If you own your own business, your employee compensation and benefits package can be the deciding factor for many potential employees.
And it's not just the money.
HowStuffWorks "How Employee Compensation Works"
Benefits are forms of value, other than payment, that are provided to the employee
in return for their contribution to the organization, that is, for doing their job.
Employee Benefits and Compensation (Employee Pay)
You can also go ask your employer if health insurance is compensation or just at his pleasure. Give it a shot.
Agian, and you are ignoring this, the Church is not forced to pay for abortions or contracptions. The insurance company pays for this. Whether this is from the employees own cash, it gets from the church, or the insurance comapny, it is the employee, not the church, who is paying for and getting the service.