He announced about 90% of what he said today last year. That 55% tax was not his idea. It was originally introduced about 15 years ago, and the Treasury always believed it to be too low. It never raised a dime, (in government terms), but the Treasury wanted it increased anyway.
If you think that it was abolished as some kind of sop to his millionaire pals, then you are just wrong. It was more of a low cost, political move that would be welcomed by a lot of working people, and that Labour would hate.
BTW, I know my stuff on this. (Only this mind you)