If I were to approach someone and tell them that if they did not give me some money, that I would take them by force and lock them in my basement, I would be arrested for extortion. If they refused to pay and I followed through on my threat, I would be guilty of kidnapping. It is unjust for me, a private individual, to earn my money in such a way, even if I then turned around and gave that money to the poor. Which is why it is both immoral and illegal in every society.
But if the government approaches someone and tells them that if they do not give the government their money, that it would take them by force and lock them in jail, it is called taxation. If they refuse to pay and the government follows through on its threat, it is called arrest and imprisonment. This is considered by many to be a just and proper way for the government to make its money.
Why is something that is unjust for an individual to do to another just for one group to do to others, so long as that first group is larger, stronger, and called a government? If something is unjust and immoral for an individual, then it is unjust and immoral for a group, even if that group calls itself a government. A change in terminology does not justify unjust behavior. Theft is theft, no matter if you call it by its proper names of theft and extortion, or by the evasive term taxation. To tax is to steal. And that is what any government does whenever it taxes. A free and just society is based on the concept of free trade. Free trade is based on the premise that “if you do something good for me, I’ll do something good for you.” The opposite of free trade is extortion, or “unless you do something good for me, I’ll do something bad to you.” Any government or society based on free trade is just. Any government or society based on extortion is unjust.
Whenever the concept that taxation is theft is brought up, the response is always that the government has to make money somehow. Which is true. But so do I. Yet this is clearly not enough for me to engage in extortion. So why is it a legitimate reason for the government to do so? Anything immoral for an individual is immoral for a group, whether they call themselves a gang or a government. Anything illegal for a private individual or group should be illegal for the government. It is no better than anyone else simply because it is called a government. It does not know more, is not wiser, it is not more intelligent. And even if they did have these attributes, that would still not give government the right to steal – which is the right to take away another’s rights to their life, liberty, and property – a right nobody ever has, least of all in a free, civilized society.