It would be good to know distance traveled, but that's likely impossible to track with any accuracy. Outside the lowest quintile I wouldn't be surprised if the 2-4x increased spending also included 2-4x as many miles traveled.
These things go hand in hand. The reason people need to own a car is precisely because of a lot of cities don't have amenities within walking distance. Hence you end up doing more travel if you live in a place like that.