Title text:
‘They really shouldn’t let those small cars drive in traffic. I worry I’m going to kill someone if I hit one! They should have to drive on the sidewalk, safely out of the way.’
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3167/


Which they already pay, the sales tax would be higher and they’re paying more in gas taxes.
and yet, people keep buying these things to buy groceries and drive on asphalt, so just fuel inefficiency is clearly not enough
Yeah, but I’m with the OP here. It should cost significantly more tax wise than it does to disincentivize it