These are shortcomings and lackings in the current legislation that they have found no solution to this problem. When new immigrant is being protected from abusive relationship, the sponsor also needs to be protected with whom marriage fraud has happened because not all cases are the same.
Yes, I agree with these points. From my experience, I would say that there is a big scam going on. Even the families are involved in such marriage frauds as they want their son/daughter to obtain PR in Canada through marriage and after they are sponsored, they change all together and abuse the sponsors. These families are crazy about going abroad and can do just anything for that to happen; their son/daughter do not feel ashamed of sleeping with someone and having sex after marriage to show the sponsor that marriage is legit but they leave the relationship as soon as they get PR. In some cases, women were pregnant when their spouse deceived and left the marriage after getting PR
There are ALWAYS shortcomings and gaps, in any society and legal system. Government simply cannot do everything; and civil courts are always imperfect as due process imposes restraints.
We can look at and analyse the gaps that you imply exist here - and from your perspective they are gaps - but they exist because of contradictions in what (some) people want, priorities that conflict, and what a reasonably fair legal and administrative system (criminal, the deportation and immigration processes, and the civil courts).
And it ALWAYS boils down to the fact that first and foremost, adults must take responsibility for their actions to reduce risk to a reasonable level.
What are these contradictory and conflicting priorities? Here's a few:
-We have decided (collectively) to respect 'cultural differences' in treating most types of marriage (including arranged marriages) similarly and as valid. This increases the risk of some types of marriage fraud, whereas we could - hypothetically - require applicants to reside together for, say, a year beforehand.
-We have prioritised that allowing anyone to be 'held hostage' by the threat of revocation of residency status in a marriage they do not wish to be part of - for reasons of abuse or really any reasons at all - and rightfully so. This means that yes, any sponsored spouse can 'walk away' any time they wish, including - hypotehtically - the day after arriving in Canada. (Caveat that IRCC might investigate and decide this was for purposes of immigration fraud, and a next day separation will give them some serious grounds - this is not advice to do so unless of course unsafe)
-Due process: all 'solutions' that some people want are subject to due process - and due to the nature of a marriage being (at heart) private, and unfortunately even sexual abuse, very often the evidence to support claims of fraud, abuse, criminal behaviour, etc., is simply not available, or not to the level that even a criminal, administrative, or civil procedure would require to be enforceable. Deportation in particular is a difficult procedure legally and administratively, and prioritisation will always rank the obvious and feasible cases higher. Not all fraud can be shown to even the lowest legal standards to be fraud.
The issues with potential marriage fraud are clear, and news articles cover it.
Again - while the government can do SOME things to reduce the incidence - bottom line is that it is primarily the responsibility of the sponsors to vet their spouses, or to choose not to enter into marriages where the risk is higher. As I said elsewhere - due to the conflicting priorities (and yes, incl weaknesses of the system), the government's priorities and interests are not yours, and no-one should rely principally on government to protect themselves from such fraud.
While I don't agree everything that was stated on the topic, I think the point made by
@James Russo above is correct: sponsors should NOT expect that the government's interest or capability to deport their sponsored (ex)spouses/partners will meet their desires. Almost all of the time, they should forget about their spouse and their immigration status/deportation (
after cutting themselves off and protecting themselves, including after reporting what evidence they have of immigration fraud or criminal activity). Once separated / divorced, the immigration status of their ex is no longer their business.