That's a nice idea, but not one likely to carry much weight. Boatloads of TRV applications fail every day on the "I am not satisfied you will leave" ground. It would be nice if that could be overcome by the simple device of having the spouse/sponsor swear an affidavit to the effect of "I solemnly swear that my spouse will leave Canada by his/her visa expiry date even if I have to hogtie him/her and carry him/her onto the plane myself".
If such an affidavit would be of any value, word would be out by now that such an affidavit will boost prospects of success greatly. They would be in routine use already. Too, as a practical matter, what if the sponsored spouse turns rogue and won't leave? What does the IRCC do with the affidavit? What would be the government's remedy?
One possible remedy would be to say the affidavit turned out to be false and to charge the deponent with perjury. That would not really solve the underlying problem. The ship jumper would still be here. What else? Maybe the IRCC could take the position that the content of the affidavit has contractual force and the IRCC could sue for damages for breach of contract. But then, what would be the measure of damages? It's trite law that damages must be proven. Of course, the IRCC really wants the miscreant spouse gone, so then the desired remedy would be what lawyers call "specific performance". You want the contracting party to do what they promised to do. But, will a court tell the deponent spouse: "You promised to get your spouse out of here, so go do it!" I know that won't happen, probably for reasons that require no explanation.
But, (and this is getting to be fun), let's ignore the reasons why a court won't order specific performance and suppose that a decree of specific performance is, mirabile dictu, granted. The spouse who is subject to the order then tries mightily to round up and ship out the wayward spouse, but fails in that effort. Now what? Well, the remedy then is for the IRCC to take the sponsor back to court and seek to have him/her held in contempt of the order for specific performance. As is usual in contempt proceedings, likely the spouse will be given a week or so to "purge" his/her contempt by doing what was ordered. If that fails, the IRCC can come back and seek a punishment for contempt, such as a fine or imprisonment, or both. All good clean fun, for sure.
Long ago on this forum, in one of some 400 posts I made here long since wiped out, I suggested a willingness to do much better than an affidavit. Anyone can swear an affidavit. I suggested putting one's money where one's mouth is. I suggested the sponsor spouse put up an irrevocable letter of credit or cash deposit, of, say, $50,000 or so. If the applicant spouse does not get on the plane, the sum is forfeited. Party time at the IRCC with the forfeited funds. I would be quite content to do that in our case. I know my wife would not elect to hide and choose to remain in Canada forever as an illegal, subhuman. Notwithstanding my sporting proposition, I was told that my idea sucked. I am not sure yours will fare much better in this honourable court of public opinion.
Thanks for the opportunity for diversion and flight of fancy.