as written in a different comment, electric cars are very soon going to be the norm. and since they don't use any petrol during their usage, governments are try

as written in a different comment, electric cars are very soon going to be the norm. and since they don't use any petrol during their usage, governments are trying to find out how to recoup that potentially lost tax revenue. one such way is via "tax per mile". whatever way they choose, i don't expect any government to simply give up on that tax revenue, as that will force them to either increase other taxes or explain to their voters that some state-funded services will have to close.