[Joakal]

By your logic, why is there a monetary cost? Rich people are not deterred by cost but by driving privilege penalties, right?

[manigandham]

For administrative reasons to fund the system and as a first line of penalty.

Cost is a cost, regardless of how much you may care about it, but yes the larger non-financial penalties is what keeps rich people from driving however they want and shows that the system works fine as is.