“With respect to the pledge I made that if you like your plan you can keep it, I think — you know, and I’ve said in interviews — that there is no doubt that the way I put that forward unequivocally ended up not being accurate. It was not because of my intention not to deliver on that commitment and that promise. We put a grandfather clause into the law but it was insufficient.”
This is just like society making the decision cars will need to have seatbelts.