Usa travel ideas for An exception to this trend of deregulation and increased competition is found in extreme cases of high overheads coupled with low costs of providing additional services. For instance, the provisions of national defense, law enforcement, and the court system are very costly, but the level of service provided remains nearly unaffected as additional citizens benefit from the service. These extreme cases of natural monopolies are examples of what are called public goods. They will presumably largely remain government monopolies. BIBLIOGRAPHY. Lus M.B. Usa travel ideas 2016.