Actually, I would think that insurance companies and the Church would save money by providing contraceptive options to the employees. Birth control is waaay cheaper than covering the costs related to prenatal care, child birth, perinatal pediatric care, productivity lost due to maternity leave, additional future coverage of the infant/child.
So, insurance companies provide birth control, save money, the Church doesn't have to go against its beliefs by funding it and women who want birth control get it.