Talking about non-accompanying spouse or partner. Some of you say that they will be blamed in misrepresentation in the future. So why CIC gives such option? To accompany or not? Maybe because everyone has his own circumstances?
In CIC website we can read the following (this refers to Medical exam, but the point is also about accompanying or non-accompanying spouse):
"Non-accompanying dependants must undergo a medical exam to make sure they are admissible to Canada. They must be admissible to maintain their eligibility to be sponsored by their family members in the future."
So we can assume that if the spouse doesn't accompany the principal applicant now, it will not be impossible for him to be sponsored in the future.
Yes it will not be impossible. That's why sponsorship is there.
However, consider this situation:
You have a CRS score of 450 as single applicant without spouse points.
With spouse your score decreases to let's say 430 (No education qualification of spouse/poor english results resulting in 0 marks, etc.) and you apply as single applicant, get PR and then sponsor spouse.
CIC may think that as a family unit you don't qualify for points cut off and you jumped above other such family units by playing with scores, sponsorship may be a problem, although you yourself remain a PR.
On the other side, if the above is not the case and you still have enough points with spouse but are not taking her along for genuine reasons (Let's say Job doesn't allow her), something you can concretely prove as well as seems genuine, then maybe it won't be a problem.
I second all views from p_d2058