Can China people buy American social security when they work at Goldman Sachs?

China people who work at Goldman Sachs can't buy American social security. According to relevant public information, according to the regulations of the US Social Security Bureau, only those who work legally in the United States and pay social insurance taxes are eligible to enjoy social security benefits in the United States. Work visa holders must pay social security tax to the US government in order to enjoy social security benefits. If China people work in overseas branches of American companies such as Goldman Sachs, even if their wages are paid in the United States, they can't buy American social security benefits because they work illegally in the United States.