"I'll tell you how it will be/ that's one for you nineteen for me/ 'cause I'm the Taxmaaaan!"
The Beatles were actually paying 19 out of every 20 cents to Her Majesty's government, for a top rate of 95%.
Money is your property
Your body is your property
Slavery is foreign control of your body
Taxes are foreign control of your money
Thus, by the transitive property, taxes are like slavery
I'm not the first to make the comparison, you know. I believe Frederick Douglas compared income taxes to slavery in his autobiography. Unfortunately, I listened to it on CD so I can't pull up the exact passage at the moment.
I don't disagree, and I'm a person of libertarian leanings. Although I grant I'm not as fully given over to it as you seem to be.
I really was just trying to elucidate the sense in which I see many libertarians compare taxes to slavery.