Again, to imply that many inland sponsorship applicants come from visa-exempt countries, therefore, are less prone to immigration fraud is simply discriminatory. This is what fuels discretionary decisions and makes for flaws in our immigration system. Take US for example. Many of the illegal immigrants are actually visa-exempt Canadians who go there to work illegally for a few months and come back to Canada. Their earnings are not flagged to the IRS or CRA. When it comes to the cost of deportation in Canada, we would need data to assess it properly. Many are completely ignorant of the tremendous benefits Canada gets from illegal immigrants working in the fields. Have you ever been there? Spoke with workers who are harvesting the food that we nonchalantly buy from our local supermarket? How many Canadians would want to go to work there in summer, with the sun blasting on you? Do you think the government does not know about it? To justify the TRV refusal solely based on the fact that the TR intends to stay in Canada permanently goes against what the law says. The law simply wants immigrants to have a legal stay. Someone who is visa-exempt still has conditions they need to respect as a temporary resident. And there are even more cases of visa-exempt temporary residents overstaying and ultimately staying illegally in the country because they are not diligent in keeping track of the deadlines.Many inland sponsorship are from visa exempt countries so there are less reasons to commit immigration fraud. All the couple are not in Canada already working or studying. Tempororary visits can vary in length but if you are planning on applyIng for spousal sponsorship you are not a temporary visitor. A the only exception is if you are coming for a short vacation and returning to your home country, job, home, etc. Most would not be able to get more than a month off from their employer. Spouses of international students or on a work permit in Canada are routinely denied a TRV because they want to live with their spouse in Canada. They are supposed to apply for an OWP even if they don’t intend to work.
It is actually very hard and expensive to get someone to leave Canada if they are unwilling to go. You are talking about spouses that have already received PR and when they split up one goes on welfare. They both already have PR. There are many people who were supposed to leave Canada who haven’t and keep applying for various immigration programs and appealing if they get denied while often using free legal aid. Processing all these application comes at a cost. Eventually when they run out of options they can either go underground, leave willingly or wait to get removed. If a person is ready for removal they can apply for PPRA. If they can’t get PPRA and they don’t want to leave or can’t afford to leave Canada ends up chartering a plane (usually far from full) with armed guards to escort passengers to their home country. The flight with armed guards is 15k per deportee. If there we’re concerns that a person may not show up for their deportation they would be held in immigration sententious which is another cost.
https://www.cbc.ca/news/politics/deportation-cbsa-refugee-assistance-1.4493727
Now if we talk about deportation, that brings us to the IRB and the many cases that have been brought up against their unethical practices. I'm not gonna go into it but there are many reports pointing towards it. Their officers need a lot of training and many appellants had not been treated fairly. This aligns with your rhetoric that looks at a two-way immigration system that favours some and restricts others. Now, when it comes to the CBSA and finding a FN inad at POE, again they often use discretionary power which is not conferred to them under the law. See the recent landmark jurisprudence case of Reyes-Garcia v. CBSA and how the court's decision clarifies the application of A44.
You state: if you are planning on applying for spousal sponsorship you are not a temporary visitor. That is incorrect. You and I don't make the law. You are temporary resident the moment you are admitted in Canada until you leave the country, become PR or get your status revoked (that would be removal order or found inad).