The Constitution: Twenty fourth Amendment

Section 1. The right of citizens of the United States to vote in any primary or other election for President or Vice President, for electors for President or Vice President, or for Senator or Representative in Congress, shall not be denied or abridged by the United States or any State by reason of failure to pay any poll tax or other tax.
Section 2. The Congress shall have power to enforce this article by appropriate legislation.

It took one hundred years for the congress to ban slavery and all things like it.  It took another one hundred years for congress to ban all forms of discrimination related to treating all people like human beings.  Whitee just did not want the Darkies to have a voice in their own self determination.   The reasons are simple.  Free and voting minorities will expose the shameful, vulgar treatment and repression.  Freedom will also cost the Man some of his power and maybe money but mostly his dignity and honor.  I can understand wanting to keep my honor, my dignity my money and my power but not at the expense of some one's Life, Liberty and the Pursuit of Happiness.  At least I would hope not.    I know that there are large groups of people that do not fit the normal bell curve and confuse Life, Liberty and the pursuit of Happiness with doing whatever the hell they want.  These people are not judged by the color of their skin or the number of teeth they have, or even the size of the rats under the trailer; no not even by the quality of the choices they delineate.  They would not pay to vote unless they just made a batch of meth and still had some money left after weed whacking the entire highway system of Brevard county. 

This amendment assured that if a person was eligible to vote and wanted to vote and could get to the voting booth without being smashed in the gut with an orange, then his or her vote would be cast without having to pay anything monetary for it.  We as a country are still trying to insure that votes are cast without any cost, financially or dignitarily.  (I do not care if it is a word)