Thousands of Palestinians in the West Bank joined a strike on Tuesday against their government's proposed new social security law as Palestinian Authority President Mahmoud Abbas was set to address the United Nations in New York.The strike, which saw much of Ramallah, Hebron and other Palestinian cities closed, saw thousands of people protest outside the Social Security Corporation in Ramallah, where Abbas's government is based.Protesters were demonstrating against a proposed new social security law, fearing the fund will be mismanaged. Under the proposed system both private employers and their employees would pay monthly into a government-managed fund, with employees receiving a pension when they retire.The government says it will provide new security for employees, arguing similar systems exist in countries across the globe.But protesters say they do not trust the Palestinian government to manage the fund and point out there are no guarantees. They also say Israel's military presenc