Ideally, government money would be raised through voluntary contributions. And perhaps we’ll get there one day.
But, in the meantime, we have taxation.
And if you are poor and hungry, will you be refusing help from the government, on the basis that you believe ‘taxation is theft’? Will you be refusing to use the roads on the basis that they were funded through taxation? Will you be refusing to use any technology if the development of that technology was part-funded through taxation?
Taxation isn’t ideal. But what’s your alternative idea for funding government activity? I’m all ears!
And if someone is starving to death and no-one volunteers to help them, are you suggesting the government should just stand by and allow them to starve to death?
Go on! I dare you to answer that!
(And in answer to your question: I wouldn’t want to throw anyone in jail for not paying taxes — and I wouldn’t be shooting them either! If people don’t want to pay tax, they should be allowed to go and live on an island somewhere with no tax-funded infrastructure or services and live tax-free for as long as they can manage it.)