community-based health insurance. Contributions are not risk-related, and there is generally a high level of community involvement in the running of such schemes. Universal health care systems vary according to the degree of government involvement in providing care and/or health insurance. In some countries, such as the UK, Spain, Italy, Australia and the Nordic countries, the government has a high degree of involvement in the commissioning or delivery of health care services and access is based on residence rights, not on the purchase of insurance. Others have a much more pluralistic delivery system, based on obligatory health with contributory insurance rates related to salaries or income and usually funded by employers and beneficiaries jointly. Sometimes, the health funds are derived from a mixture of insurance premiums, salary related mandatory contributions by employees and/or employers to regulated sickness funds, and by government taxes. These insurance based systems tend to reimburse private or public medical providers, often at heavily regulated rates, through mutual or publicly owned medical insurers. A few countries, such as the Netherlands and Switzerland, operate via privately owned but heavily regulated private insurers, which are not allowed to make a profit from the mandatory element of insurance but can profit by selling supplemental insurance. Universal health care is a broad concept that has been implemented in several ways. The common denominator for all such programs is some form of government action aimed at extending access to health care as widely as possible and setting minimum standards. Most implement universal