Social system, social programは社会制度。 The social security system, social security programは社会保険制度。 Welfare program-福祉制度 制度 = system / organization 学校制度　＝ The school system / The school organization 社会制度　＝ Public system / public organization That is a public organization in the public sector 国営部門の社会制度です。 ご参考になれば幸いです