Judging from the doctors I know, it's not the difference between middle-class and rich - it's the difference between a bit rich, and very rich. The doctors I know live in the nicest parts of town in houses that are worth three or four times what mine cost. My SIL once overheard the doctor she works for telling her banker to pay off the rest of a mortgage on a house she'd only owned for a few years.

You can still make an excellent living as a doctor in Canada.