Was Religion invented to keep all the poor people from killing all the rich people?

Originally, the moral injunctions of most religions were designed to keep the rich and powerful from running roughshod on poor and powerless people. But invariably the people with the money and the power always take over the message and turn it against the poor. That's why the more financially successful churches focus on personal sins like robbery, drug abuse and , rather than the big, hard to pin down sins like pollution, profiteering and redlining. After all, they wouldn't want the generous folks who pay for their fine buildings and furnishings to go away mad...