Any hospital district may enter into a contract with a hospital or with another district to consolidate or cooperate for mutual purposes, including, but not limited to, ambulance or emergency vehicle services, or may enter into a contract with any federal, state, or local government agency for hospital or doctor services, upon terms suitable to all concerned, and power to make such contracts is hereby conferred upon such state or local government agency in addition to such powers as have been heretofore provided by law.