There is, perhaps, no greater venue for illustrating exactly how vast a disparity exists between the haves and have-nots right now than at the sale of million-dollar artworks. Lending support to the gathering of disgruntled art handlers who have been locked out of Sotheby’s auction house in New York since August, Occupy Wall Street protestors have made things very uncomfortable for the auction house and its clients during the two biggest sales weeks of the year.