The RCC implemented measures for social reform, adopting sharia as a basis. The consumption of alcohol was banned, night clubs and Christian churches were shut down, traditional Libyan dress was encouraged, while Arabic was decreed as the only language permitted in official communications and on road signs. From 1969 to 1973, the RCC introduced social welfare programs funded with oil money, which led to house-building projects and improved healthcare and education. In doing so, they greatly expanded the public sector, providing employment for thousands.