You should check your Bible before you criticize the LDS church for practices that are found in the Bible. The united order is based on the Biblical law of having "all things in common" as practiced by the early Christian saints. It is nor "socialist" or "Communist" just as biblical tithes or offerings for the poor are not socialist. The believers laid their posessions at the feet of the Apostles who distributed them. It was a freewill offering based on the love of Christ and his Unity. Socialism and Communism are the forced taking of property by government. If we followed your logic any donation, offering or tithing to a church for the needy would be considered socialism. The practice of the Church of Jesus Christ of Latter Day Saints is based on Biblical precedant.
http://bible.cc/acts/4-32.htm Acts 2:44 All who believed were together and had all things in common; 45they would sell their possessions and goods and distribute the proceeds to all, as any had need.
Matthew Henry's Concise Commentary... In effect, they had all things common; for there was not any among them who lacked, care was taken for their supply. The money was laid at the apostles' feet. Great care ought to be taken in the distribution of public charity, that it be given to such as have need, such as are not able to procure a maintenance for themselves; those who are reduced to want for well-doing, and for the testimony of a good conscience, ought to be provided for. Here is one in particular mentioned, remarkable for this generous charity; it was Barnabas. As one designed to be a preacher of the gospel, he disentangled himself from the affairs of this life. When such dispositions prevail, and are exercised according to the circumstances of the times, the testimony will have very great power upon others.