Giving is an extension of our relationship to God. We are asked to give financially to the church, because God asks us to give.
In 1 Corinthians 9:7 the Bible tells us, “Each one must give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver.”
Also, Malachi 3:10 tells us “to bring the full tithe into the storehouse,” which was used in Old Testament times to care for servants of God and the poor.
In our day, God uses regular giving to provide for the local church, its people and ministries.