How taxes can work for bitcoin one day.

One day we will be living in a different world where only cryprocurrency exists. People often say but how will we keep an infrastructure without tax money and how will you tax bitcoin?

What if tax worked like VAT did and it worked sort of how it does when you pay import duty. Different items will cost different amounts of tax which will be collected and sent to the government each day or week or month or whatever is decided. Yes you can do private transactions and not pay any tax but you couldn't do that to often since you might have your business assessed if you only claiming to sell x amount of items when it should be at least y amount of items.

Another way an infrastructure can be built is without tax and instead business and companies offer shares in what they do and people will invest to profit and some of that profit will go back to the company so they can continue their work. For example a company that makes concrete another that makes roads or bricks or buildings. Each person would need to gave an investment in something to support the infrastructure. So I guess it can be called taxing but its taxing in a more decentralized way where x % of your total income must be invested and used to support the essentials.