Providing free BC is a no-brainer for costs-control. It costs far less to help a a man or woman who cannot afford BC to prevent a pregnancy than to provide OB services, pediatric services and likely WIC (food supplement for low-income children and pregnant women), Food Stamps, subsidized housing, etc. If the man or woman cannot afford BC, they will most certainly be eligible for Medicaid, WIC, FS, and income-based help with housing.
I hear conservatives screaming "personal responsibility". If I have a couple of kids, don't want to have more and have to choose between purchasing BC and keeping a roof over my kids head and food in their tummies.... I'm choosing my kids. Many families have been faced with this dilemma in the past because insurers refused to cover BC or had extraordinarily high co-pays for BC.
Perhaps allowing true free-market forces to intervene in drug pricing would stop drug companies from raising prices. Let prescription drug providers buy foreign drugs and see how fast all drug costs plummet. US citizens pay far more for drugs than citizens of other countries.