I have spent my entire adult life as a Bible teacher, counselor, and worship leader, and I have done it as a volunteer. I paid for my theological training, and I have rarely been paid for my expertise. I have never taught that Jesus was a capitalist nor do I have a Cadillac.
There are always people who are willing to take advantage of religion to their own ends. There are always people who are willing to teach things that are misleading. There is nothing in the Bible that would encourage anyone to teach that we are guaranteed a wealthy life. But your question is an interesting one if we turn it around. What makes Christianity so amazing is that it can be a true faith for a very wealthy person with multiple houses and it can be true for a beggar. Christianity can change the heart of the youngest child or a hardened criminal. It can be found in communist countries, countries with kings, in capitalism, or anywhere. The amazing thing is that the gospel of Jesus Christ is the great equalizer - Galatians 3:28 says, "There is neither Jew nor Greek, slave nor free, male nor female, for you are all one in Christ Jesus." (NIV1984)