I just think it's important to take our fellow human beings not as objects to be taxed, but as individuals to be convinced. If you think helping some group of people is a good idea - convince me, don't just steal from me. If you steal, this doesn't make you a single bit more moral.
Same with religion, maybe those initial people will not be Christians, but maybe their grandchildren will be if the occupation continues. The Ottomans, for example, converted people to Islam through tax incentives and education.
A test case for you:
In Canada (and Australia), for example, 89% of the land is in direct ownership by the Crown, the other 11% is rented by the Crown to individuals in the form of land tenure. Legally, the Queen is not allowed to permanently sell any land, as they are subject to the old rules of English family law, where descendants are to be entitled to inherit the land. The Queen, through the Government of Canada which represents her, is the owner of the entire country. Does she not have the right to charge whatever rent rates (taxes) she would like? And are not people paying these taxes voluntarily as long as they live on this rented land?
Easy to test. Ask people if they would keep paying taxes if they weren't afraid of IRS (or equivalent). My experience: the answer is NO with most.
> A test case for you
The question is where this legitimacy of owning a land by the Queen comes from. The royal family simply declared certain territories their own, then used government forces (sponsored by taxation) to enforce this. So I'd argue it's the people who paid taxes who own the land, not the Queen. What you have, though, is a perverted situation in which people pay taxes to have their land taken away from them and then leased back. That's insane.
Maybe you should ask, instead: "Why do you pay taxes?" And allow the respondents to give you a wider set of reasons. Maybe some will say it is out of fear of the IRS, but some people might not say that, or say something different. It's still a 'test' of the matter, but it's a less leading test and it's the sort of test that follows from what I've said.
Sorry, the Queen test case was just for fun. Wanted to see what you'd say. Yeah, the Queen cannot legitimately own anything by that conception, since it is all ultimately tainted by a long historical process of beating out competitors on the British Isles.
That goes back to what I said before, which you ignored, if you were to ask me: "Would you still work if you were a millionaire?" I might say: "No." That's true, but it's not true for any useful purpose, because I'm not a millionaire. If you ask me: "Why do you work?" I might say: "Because I like making money." In fact, the latter case is a more truthful statement than the previous case, because I don't actually know what Millionaire-Me might do whereas I do know what Non-millionaire Me would do (work). In any event, the previous question doesn't tell you whether or not I consider the fact I work voluntary, in fact, it doesn't tell you very much anything at all. I personally do consider the fact I work voluntary, but you'd have to ask the latter question to find that fact out. If you just had the previous question and left it, you might as well assume I believe that I work involuntarily.
In the end, you ARE asking for an opinion, the way you propose is a less honest way to do so considering what the inquiry at hand is. Remember, I said that people might have multiple reasons why they pay taxes. This is a sociological fact. Even one person might have multiple reasons why they pay taxes.
If you asked me your question:
"Would you pay taxes if you weren't forced to?" I'd say: "Yes." That's all you get.
My question:
"Why do you pay taxes?" "Fear of jail if I don't, because they pay for roads, social services, because I believe they are a legitimate exercise of function of government."
I'm not lying, no reason to, I pay taxes for multiple reasons and so do most people, and these preferences themselves may be ordered, maybe on my scale of preferences the fear of jail is in-fact less than the fear of potentially unmaintained roads if I have a nice car, for example.
Actually, an idea: Presumably we can synthesise the inquiry, ask "Why" and then ask "Would you still do it", or do it in reverse order. Then, ask people what their preference scales are, etc, etc. You'll find out more information about the reasons people pay taxes, you'll also find that what I said before is true: people pay taxes for multiple reasons.
How about "But that's the moral argument and it's a simple one, I don't see government force as illegitimate and therefore I'm fine with taxation, regardless of who is being taxed"?
Basically, you are okay if people who disagree with your opinion can be beaten and their money confiscated. This does not say anything good of you as a fellow human being.