The Body of Christ on earth has many needs. It usually has been hindered and limited in its outreach to help people because of a lack of funds. With more money, we can help more people. We can print more literature, send out more missionaries, build more churches, etc. We need prosperity not just so we can be comfortable, which is not wrong, but so we can be more fruitful members of the Body of Christ.
More people have financial needs than any other kind.
Millions suffer and die from malnutrition. Millions live without adequate shelter or clothing. Only God is great enough to take care of everyone. We do not have the resources to care for the world directly without God's help. All the people of the world need to walk in God's blessings themselves and be productive.