What about electric cars? At this point most of the wealthy get all the tax breaks from owning these cars. And they don't contribute to the upkeep of the roads since no gas tax.
The wealthy paying for expensive electric cars (I'm sure you're insinuating Tesla) are subsidizing the build out of charging infrastructure as well as a manufacturing base for electric vehicles and batteries.
Those tax benefits the wealthy receive are a less risky subsidy than directly giving electric vehicle and charging infrastructure companies funds directly. Its a balance between doing nothing and doing something more drastic (full disclaimer: we aren't doing enough, and we should be pouring buckets of money into electrification of mobility, but that's an argument for another thread).
With regards to gas taxes, most people already aren't paying their fair share of gas/road taxes (the US highway trust fund is completely broke). I'm not sure electric vehicles are contributing to the problem as much as the existing 253 million internal combustion vehicles already on the road (not counting heavy trucks, that contribute even more to road damage).
It's true that user fees - gas taxes and tolls - for motor vehicle drivers in the US pay far less than the costs of the roads they use. I think it's roughly 50%.
However, assuming that by "electrification of mobility" you mean "everybody who's driving their own car keeps driving their own car, only it's electric rather than gas-powered", then I believe you're looking at it all wrong. In cities where people increasingly live, single-person cars have huge negative externalities aside from fossil fuel consumption, starting with congestion and moving on to over-building of parking, road deaths, sprawl, etc. Electric cars won't solve all of these, and neither will self-driving cars, or self-driving electric cars.
Instead, what we need for mobility in cities is better land use, with dense areas or corridors, safe walking and bicycling infrastructure, frequent and convenient mass transit, and congestion charging.
Road wear is proportional to the fourth power of axle weight. It's the lorries that should be paying for road upkeep; the amount of wear from cars is negligible.
Money is fungible, through progressive taxation those people (unless they are hedge fund managers who pay lower tax than almost everyone else) heavily contribute to the tax base even if it isn't earmarked for roads to the extent gas is.
> (unless they are hedge fund managers who pay lower tax than almost everyone else)
Everyone whose income is largely derived through long-term capital gains does this, really; hedge-fund managers just happen to be people who seem like they are working for someone else but manage to get paid for that work in a way that gets them taxed like capitalists.
(Which might explain while a few notable actual major capitalists -- who don't favor general reform of taxation on capital -- have come out in favor of reforms that would tax hedge-fund manager earnings like normal income.)
