So, in essence, we punish responsible people who save for retirement. No thanks.
Also, one unintended consequence of this policy would be that the MINIMUM interest rate you would have to pay would be 3.75% because below that it makes more sense to just buy a gold bar and bury it in the backyard vs. lend it out.
Basically, the way you can imagine the impact of that is that your mortgage interest would (today) essentially double. Again, no thanks.