Crazy ass theory. There is a huge pilot shortage, Delta purchases... Air Willie or Skywest. Takes all pilots from that airline and staples them on the bottom of their seniority list. Nullifies contract with mainline, ie Usairways or United. Thus causing financial harm to competition. Has an immediate pool of "qualified" pilots to replenish retiring pilots. Not good for whollyowned pilots but will enhance financial stability of Delta.
Just a thought, don't think it would happen. But what if?