Here's my simplistic logic. Right now CRNA's are cheaper than MDAs therefore it stands to reason people would rather hire the cheaper worker. This is essentially why we have outsourcing of jobs in other fields. Well as CRNAs demand and get more priviledges and are able to bill like physicians their salary will go up. But this has an asymptotic limit. So I guess when their salaries are about equal to physicians then they'll be the ones out of work. The reason is if I had to pay X dollars for an MDA or CRNA I'd ALWAYS go with the person with the MD because they can do more. Does this seem like a reasonable assumption? So screw all the CRNAs because MDs will ALWAYS be superior and when push comes to shove all the people would prefer us.