First: many promoters have brought in the Torah to validate this practice. They claim Torah is teaching socialism. Second: The United states governmental system, is not perfect, it was based on some Torah principles and the overarching theme was to give freedom, self - governance to individuals, not government control over the minute aspects of our lives, especially on our finances. This was different than every other government existing at the time.
One of the main framers of our constitution stated: “To take from one, because it is thought his own industry and that of his fathers has acquired too much, in order to spare to others, who, or whose fathers, have not exercised equal industry and skill, is to violate arbitrarily the first principle of association, the guarantee to everyone the free exercise of his industry and the fruits acquired by it” (Thomas Jefferson, letter to Joseph Milligan, April 6, 1816).
Social Justice = Theft via the government.
Though my family went to Temple Israel in Hollywood [which is a great place], still when the message about social justice was announced there my mother and father were cold in their reaction. They did not think that the Torah was about social justice but rather about real justice. "Thou shalt not steal," is an important principle even if the theft is done by means of government.
I should mention that in the Torah there is מעשר עני the tenth of the crops that go to poor people on the 3rd and 6th year of the Shemita cycle plus the fact that on the Shemita anyone can come into one's field and gather what grows by itself.
This however is not a blank check for the government to take what it wants and redistribute it to those that vote for it.