One of the primary functions of government in modern societies is the provision of basic infrastructure/services to its citizens, for example, good roads, education, health care etc. In order to perform that function, government usually establish, finance, own and manage various corporations/agencies saddled with the responsibility of providing such infrastructure services. However, modern realities have made it impracticable for governments, all over the world, to be able to fully finance infrastructural projects, hence the need to access private funds for public benefits. Government use of private contributions for the public benefits is nearly as old as recorded history. For example, in the ancient city-state of Athens in the fourth century B.C., prominent citizens made major contributions for staging costly public festivals and religious events and for building public buildings and monuments.