At the moment many poorer people have to buy old cheap cars, and they have to as the public transport is either non existant and /or very dear. Now these vehicles are going to be the bigger vehicles that fall into expensive tax category as the small cheap ones do not last. It will also be a very good PR situation as it will appear that the poor are being thought about seriously as RFT affects the poor the hardest!
It will stop the police being tax collectors, and worse being seen as such. Most people accept no insurance is wrong, but RFT is seen as an unfair imposition.
It will also stop the attitude that "foreigners dont have to pay tax". Thereby giving a more level playing field and many lorries, now registered in France and Holland will come back to being UK reg along with their drivers and thereby paying UK Income Tax (I personally know at least 1 company that has all their wagons reg in Holland and all the drivers, British, pay dutch income tax!!)
The 2 biggest though is the Swansea reduction, and immediate receipt of 10 years RFT.