Why bother with these changes?
What’s needed is a structure where banks have to carry the can for mortgage defaults. The mortgage should be secured against the value of the house. If the house is repossessed and sold the bank and not the customer should be liable for any outstanding loan balance. If that was the case then banks would be far more cautious about how they lend. It will make borrowing more expensive but it will not give one cohort of borrowers an advantage over any other (outside of what sensible lending practices should dictate anyway).
What’s needed is a structure where banks have to carry the can for mortgage defaults. The mortgage should be secured against the value of the house. If the house is repossessed and sold the bank and not the customer should be liable for any outstanding loan balance. If that was the case then banks would be far more cautious about how they lend. It will make borrowing more expensive but it will not give one cohort of borrowers an advantage over any other (outside of what sensible lending practices should dictate anyway).