Legality != morality. The legal system is not the objective arbiter of what is and isn't moral. As I said, theft is "depriving the rightful owner of personal property", which fits your definition. Taxation simply happens to be a legal form of it.
That's not exactly right. Legislation is (and must be) based on the morals of the society (although there are examples of famously ineffective laws which went against social morality, which resulted in them having very little legitimacy).
I am, of course, talking about democratic systems of governance where people actually have a say in the content of legislation, rather than dictatorships (either theocratic or secular) where laws are imposed on people as the Great Leaders see fit.
If a law is immoral (ie. opposing to the moral code of the general public), I would actually argue that in a properly functioning democratic system it will end up being contested and changed.
If that doesn't happen, I see it as an indication that the democratic system is not functioning properly...
What I find interesting is your opinion that taxation is theft despite it being legal. You are not the rightful owner of the taxes you pay. It's that simple.
This is a very dangerous position to hold. Who, then, is the rightful owner of that portion of your money? The state? If you take that to its logical conclusion, then is a person only entitled to as much property as the state deems, in its sole discretion, to be appropriate?
I'm so tempted to quote the bible on this occasion that it isn't even funny. You know, the part where they discuss whose face is stamped on coins and who they belong to.
But that would be no argument for or against anything, just a literary anecdote.
Instead I'll point out that you're trying to construct a straw man here. Taxes don't limit overall ownership, and no one can (legitimately) say how much value a person can own. Nor do they attempt to do such a thing (excluding attempts of implementing communist societies with no personal property, and they've all pretty much failed).
No, taxes are actually more of a transaction fee.
An employer pays you salary and part of it is taxed; in most sensible setups the taxed part never arrives on your bank account but rather the employer pays that part directly to state's accounts. So if you never were in ownership of that representation of value, who did it belong to, to begin with?
In a way, money does belong to the state that authorizes it as a legitimate tool of exchanging value. They provide the security that any currency needs - the knowledge that this abstract representation of value actually can be exchanged for physical goods and services, and to measure the value of all other items.
So when people exchange money, the state demands a transaction fee. Whether it's you paying the VAT for products, or the employer paying the income tax of your salary, it is the same thing in both cases.
Of course, this model is simplified and you could rightfully say it doesn't apply to doing business in unsanctioned currencies like cryptocurrencies or foreign currencies, but I believe there are pretty strict definitions for tax evasion and money laundering that deal with those issues.
On the baseline, Battuta's argument is right. Taxes are a common payment for all the use of public goods everyone in the society uses. Providing a stable currency is just a small part of those services.
If you consider taxation to be theft despite it being sanctioned by the legislation...
...then logically you should consider killing people in war to be murder, regardless of the fact that it is sanctioned by the government waging the war, and in many cases sanctioned by the international legislation as well.
War is a special case because soldiers essentially put their life up as collateral when they fight. Killing civilians in war could be described as murder.
Taxes are a special case because taxpayers get much of the value of their taxes back in public goods. You don't get anything back from theft.
See, if you can add stipulations to things, I can do that as well.
But if we keep things simple and define theft as taking another human's property without consent (as you seem to do in the case of taxes), and murder as taking another human's life without consent (which is an analogous definition)...
...then if taxes are theft, killing in war is also murder.
All I'm saying is, if you want to think in black and white terms, go ahead, but at least be consistent about it - if you apply one type of logic on how you define taxes to be theft, you can't really opt out of that same logic on other topics.
And, again, if my money were taken from me - with or without my consent! - and then used for a. helping people and b.
murdering people, I would be far more upset about the part where people die than the part where my money was used to pay for someone's education or surgery costs.
Or, like Battuta says, determining where my tax money goes is more important than how much I have to pay. I have a privilege to live in a country that doesn't spend billions of eurobux on killing people on distant lands, so that's something I don't really need to trouble myself with. Instead I'm more interested in how well the money is used - repairing roads, maintaining the good education system, public health care, etc. etc.
Of course, war has been described as exactly that - a
calculated, condoned slaughter of human beings, to quote a veteran of First World War. I don't personally believe soldiers who kill in battle to be murderers - but neither do I think taxes are theft.
A more appropriate extrapolation is abortion. Abortion is morally equivalent to murder, as it is the taking of an innocent life without justification. The fact that it happens to be legal doesn't change this.
There are more than enough justifications for abortion in most cases, and even if you disagree on that the analogy doesn't really compare because there is no commonly agreed upon definition on when human life begins, so it's entirely subjective whether abortion even qualifies as murder - if there's no human life taken, it can't be murder. But this is not the place for that particular discussion (which we've had several times with very little effect on anyone's views on the matter).
EDIT: Adding this relevant piece of art to remind us of the problems related to redistribution of wealth