Again, I dont see why the IEC would not go through... but if it didnt, would she be able to come as a visitor, look for work, then apply for a working visa while in Canada? She is well educated and has good work experience in the UK.
Yes, she would but without the IEC or a spouse work permit, she would not get an open permit. She would have to find an employer, the employer has to apply for an LMO proving that they have looked for Canadians for this job and not found any and then she can apply for a work permit but it will only be valid for that employer and that position.