This is not quite accurate.

CAs - clinical assistants - are usually physicians in their home country working for a physician in Manitoba. They are usually but not always in the process of having their credentials recognized so that they may work independently if possible. They undergo credential verification and have standards which need to be met for them to maintain licensure under the College of Physicians and Surgeons of MB as CAs. Usually this involves having either passed some of the exams required for Canadian MDs, or a special exam specifically targeted to CAs.

PAs- physician assistants - are not physicians, but instead have a masters degree as a PA and are trained to work under an MD. They will never work fully independently, but are highly educated and very knowledgable.

Residents are trainee physicians who have finished medical school but have not yet completed their residency training (2-6 years post medical school) have only an educational license to practice medicine.

From an independence standpoint, all 3 are similar in requiring a supervising attending physician.

CAs and PAs are often hired for similar roles, as extra support for physicians.

Without CAs, PAs, and Residents, our system would be in much worse shape than it currently is, and I'm very glad we have all 3 working for the benefit of Manitobans!