You are asking for a loss transfer system for corporate groups. As I understand it, the Income Tax Act already contains a provision that allows that. Unless I am mistaken, it is restrictive essentially because in the past it has been used to launder money, to bring dirty capital from overseas into the Canadian economy and to facilitate abusive tax planning. Some companies with large losses used those losses to avoid paying taxes.
The regulations are strict because there were major abuses, as I recall.