The f*cking roads.
“But without taxation at gunpoint, how will we have roads? Society will collapse!”
Or, people would pay for them like they do in rural areas already. People voluntarily pay for things they want; this is represented by every single non-coerced transaction ever made.
Technology has provided more advanced options than before. Roads and shared infrastructure can be handled efficiently via Kickstarter style organizations. People can propose a road construction or improvement project at any scale, from “build a bridge to England” to “fix that god damn pothole on 22nd Street”. Other people can pledge towards the project. Contractors can bid on it. Every donated dollar gets a vote towards which contractor gets the job. Once donations meet the accepted bid, money changes hands and construction starts. No muss, no fuss, no violence. People without specific desires, or who just don’t care about the specifics, can create or donate to slush funds that in turn donate to specific projects of a certain type. Want to help poor people? Donate to the Ghetto Road Improvement Fund. Think trains are the future? Donate to the Glorious Public Train Fund. Ride your mountain bike everywhere and think that pouring tar all over the ground hurts the environment? Keep your money without being forced to fund projects you find morally repulsive.
The biggest benefit here, aside from the lack of violent coercion, is that the will of the people is represented as effectively as possible. It’s easy to say this or that, or check a box on a ballot, but what people really believe is shown in how they spend their time and money. The priority of each individual piece of infrastructure can be voted on directly. A busy road will be kept immaculate. A twelve mile long road with one house at the end will be allowed to degrade in favor of a 200 foot road with sixteen houses on it. Further, road maintenance in general will align with the local community’s priority therefor. Would you rather live in a nice house on a dirt road or a shoddy house on a beautiful road? Seriously, that should be for you to decide individually.
The big loss here, of course, is that corrupt politicians with no skin in the game can’t take other people’s money at gunpoint and give it to their brother in law’s contracting firm. Oh, and contractors would have to do a good job, on time and within budget to get their bids accepted.