Paying by the size of your car

You all heard about the fuel subsidy for vehicles with smaller CC.
Here's what I heard, and a thought for you:

1. Users are to swipe their Malaysian ID at the fuel station before filling up.
2. The swipe will tell what vehicle's CC the user own.
3. User gets fuel at the earned value.

So now think on this.

1. Father owns a 7 series and 1.5cc, but registers the 7 series as a gift for the son.
2. Father drives the 7 series to the pump, swipes his ID (which says he owns a 1.5cc)
3. So he gets cheaper fuel, for his larger car.
4. Son drives the 1.5cc, pays fuel for the 7 series (cant be bad, since the tank's so minute)

The rich gets a loophole, the working class pays for it?