it's not weird, it's the principle of "what has the lowest administrative cost per tax dollar squeeze yield"

people don't use bicycles to do business very much so there isn't much money in squeezing people, plus it would be more paperwork versus the amount of tax revenue

they are lazy

you should watch the movie THX-1138, the theme of how evil shit has a limited budget is the overarching theme of it (Logan's Run and Soylend Green are also similar themed)