I wish the market did a better job of ensuring that car owners pay all the related infrastructure costs, as opposed to other taxpayers. Taxes and tolls for everything, including public parking spaces.

Gas would cost more. Car ownership in cities would cost more. Roads outside of cities would cost more. Trucks damage roads more than cars and would have to pay more. Etc. It's not a free market if these things are being paid for by all taxpayers, including those who don't drive.