PACS, the latest threat to italian traditional family!

Italian government is wondering to introduce PACS , a form of civil union other than marriage. The achievement of such an agreement between two persons tends to fit a new social reality, couples (homosexual or straight) that live together and have children without being married. These are some of the rights that would be granted to such couples :

• Regulation for shared properties.
• Assignment of rights for reciprocal assistance
• Regulation for inheritance
• Assignment of old-age pension to the partner (in case of death)
• Hospital visit right
• Prison visit right
• Right to make decision in case of partner illness

The political debate about making PACS is really furious. Now could someone explain me the reason why not to grant such rights to couples that want to spend their life together?