I think the Lufthansa union support this move on the basis that the DUS-EWR A340 isn't viable, there are no 737-700 rated pilots in LH to operate the BBJ and they don't have anything like an Airbus corporate jet config available in the near future. If they can fill a BBJ with high-profit passengers then why not, its probably better than having them disappear off to the states on Continental or United. The key is to ensure that this concept is a short term move only, and not the start of management cherry picking the lean but lucrative routes out of mainline flying.