I'm not disputing what you're saying. I agree with you. From an enforcement standpoint, the concern would be that the more documents that exist to allow the cross-border travel of individuals, the more risk there is.
If I remember correctly, as this goes back several years--I believe this is based on discussions with our American counterparts--right now there is something in excess of 1,200 different kinds of documents being used to cross the border. As for the likelihood of any border enforcement official being able to recognize whether the document being produced is a true document or a counterfeit, with that number of documents, it's pretty challenging.
I agree with restricting the number of documents that are being used to allow this travel. In terms of specifics for the day pass, I have not been privy to any of those discussions so I would have to go back and check. I can undertake to come back to the committee here with a more formal response.