Contradiction in the Constitution

"Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction." -The 13th amendment of the US Constitution

Taxation of one's income, and forcibly removing whatever percent, in effect means that the portion of that individuals labor, represented by the income earned and subsequently seized by the government, puts the taxpayer in the position of indentured servant to the government.

If one agrees with this line of reasoning, then regardless of the fact that the 16th amendment authorized congress to lay and collect taxes on income from any source, is in direct contradiction with a clear understanding of the 13th amendment. If taxation of income puts the taxpayer in the position of indentured servant, and the 13th amendment clearly outlaws indentured servitude, then both the 16th amendment and the 13th amendment cannot coexist to any rational thinker. Think about that.