The qualifications for being an elder should not be limited to them. They should be characteristics of all Christians. This article explains that in 1 Timothy 3:3 God calls Christians to be generous, not lovers of money.
For a Christian, giving should flow from gratitude for what Christ has done for him. Therefore, the Christian gives for the glory of God, according to God's law, and out of faith. The Christian should also be generous in his giving.