Continuing with Dunn's questions...
What does it mean to speak of God as “God of the poor,” or as biased to the poor? What responsibility toward the poor do the Bible and the Gospel lay upon the well-to-do?
...Answer: God went to the poor because He despises the proud, but give grace to the humble (Proverbs 3:4, James 4:6). In Jesus’ day, wealth and pride seem to be a happily married couple. If you were wealthy you could be proud of yourself and your accomplishments. Not much different from today. This caused the wealthy to turn to themselves and their wealthy friends and neglect the poor and hurting.
...The poor were sometimes left on the streets to beg for food and money, or they were thrown out of the towns and left to fend for themselves. Jesus took His message to the poor and oppressed to show the rich that all people matter to God. He believed this because He believed all people were made in God’s image and likeness. The actions of the wealthy go against God’s plan.
...In the Old Testament, God asks the Israelites to take care of the poor and oppressed. Jesus tells his disciples that when they do any act of kindness to the poor or oppressed, they do it unto Him (Matt 25:36). Jesus did not advocate a prosperity Gospel, but a Gospel that changed peoples’ lives from the inside out, making them wealthier than the wealthiest person on earth. So, in a way, I guess you could argue that He did promote a prosperity Gospel of a life filled with Him and His love.