[henry quirk]

[b]An individual has a right to his life, his liberty, his property.[\b]

That some choose to violate the right of a man to his life, his liberty, his property (through theft, through murder, through slavery) doesn't invalidate the (moral) principle, the statement.

It simply means some folks are low down motherfuckers and a person really needs to keep his eyes open and watch his back.

In other words: your little observation ("Your slave for my coin.") is already addressed in An individual has a right to his life, his liberty, his property.

So: no gold star for you, lil Miss Nitpick.