I understand what you are saying. That is all in theory. In practice, that kind of transfer between spouses already exists. A person can contribute funds to their spouse's RRSP.
It has been pointed out to me that, for two people living in their first home, this measure is used to enable the spouse of the person who owns the home to purchase their first home. In the wealthiest homes, so to speak, a spouse gives money to the other spouse to purchase a first home. This is done for speculative purposes and, on a regular basis, that money is not repaid.
In that case, it is ultimately a tax loophole and it opens the door for each child from the same household to do the same thing.
Were you aware of this technique or loophole?