Actually they did believe in God, but weren't deists. Among the few who were included THomas Paine, who was roundly criticized for it. Thomas Jefferson was a Unitarian. They weren't fond of European Christianity, but were fond of American Christianity. They also knew that God had to play a role in society as without God there is no morality and society collapses.
& as for Wall Str. $9.5 million went to Obama and $5.3 million went to McCain. They have some influence, but not the control that you believe.