I agree that national defense is a necessity, but I don't think the ability to blow up huts on the other side of the planet is a necessary component to that.
Similarly, while I agree that regulating drug manufacture is a necessity, regulating drug consumption is not.
So there's first an argument from degree. It's not as simple as "Nations must be able to fight wars." Details matter a great deal, and I think a case could be made that even if war-fighting is necessary, the vast majority of what we currently spend on it is unnecessary and immoral.
Further, who decides what's necessary? I imagine a hard-core pacifist would argue that national defense is not actually a necessity. That same person might argue that access to good health care, including contraception, is a fundamental human right and therefore funding that is a necessity. Why should someone be forced to pay for anything they find immoral and unnecessary, even if you happen to think it's necessary?
My own response to that would be that some people are simply wrong about that, and allowing people to opt out of things they feel are unnecessary and immoral simply wouldn't work. The good thing about government is that it allows us to take collective actions that benefit us all but would fall victim to things like the free rider problem if they were funded voluntarily. But then we need some way of collectively deciding what's worth funding through government and forcing people to pay for, and what's not.
And this really just puts is back where we started. We have to fund some things, and no matter what they are, some taxpayers will feel that those things are unnecessary and immoral. That, I think, indicates that "I shouldn't be required to pay for things I find immoral" is not a good argument.
Similarly, while I agree that regulating drug manufacture is a necessity, regulating drug consumption is not.
So there's first an argument from degree. It's not as simple as "Nations must be able to fight wars." Details matter a great deal, and I think a case could be made that even if war-fighting is necessary, the vast majority of what we currently spend on it is unnecessary and immoral.
Further, who decides what's necessary? I imagine a hard-core pacifist would argue that national defense is not actually a necessity. That same person might argue that access to good health care, including contraception, is a fundamental human right and therefore funding that is a necessity. Why should someone be forced to pay for anything they find immoral and unnecessary, even if you happen to think it's necessary?
My own response to that would be that some people are simply wrong about that, and allowing people to opt out of things they feel are unnecessary and immoral simply wouldn't work. The good thing about government is that it allows us to take collective actions that benefit us all but would fall victim to things like the free rider problem if they were funded voluntarily. But then we need some way of collectively deciding what's worth funding through government and forcing people to pay for, and what's not.
And this really just puts is back where we started. We have to fund some things, and no matter what they are, some taxpayers will feel that those things are unnecessary and immoral. That, I think, indicates that "I shouldn't be required to pay for things I find immoral" is not a good argument.