Sorry canndo but you are wrong, you're missing Article 1 Section 2.
And yes it was amended, by the 16th amendment that gave congress the power to tax without apportionment among the states.
I believe Mr. Neutron was referring to the federalist papers when the federal government could not demand taxes from the states, so the relied on excise taxes and voluntary revenue from the states.
Article 1 Section 2:
(Representatives and direct Taxes shall be apportioned among the several States which may be included within this Union, according to their respective Numbers, which shall be determined by adding to the whole Number of free Persons, including those bound to Service for a Term of Years, and excluding Indians not taxed, three fifths of all other Persons.)
Dude, I gotta get your source for this stuff. Please. Give me a website because I gotta figure out their agenda.
The key word in Section 2 was "direct". That had always been interpreted as property tax. The definition of "direct" changed a little in 1895 when the Supreme Court ruled that taxing the income from property was also considered a direct tax. Even then, they still didn't consider tax on wages to be a direct tax. So you're wrong, the federal government could always collect taxes on wages and salaries.
What I find fascinating about this is that someone went through great lengths to make that argument. It's easily proven wrong, but I wonder why make the argument in the first place? What difference does it make if the founders had intended for the federal government to collect income taxes? Is this part of some weak anti tax propaganda movement?
If it was you, on your own, who just happened to be reading the constitution and didn't know the significance of the word "direct" then that's totally understandable. It would be an easy mistake to make. But I kind of doubt that you just sit around reading the Constitution for a good time.
-update-
I'm just going to throw this out there: Capital gains is probably considered a direct tax. While, I'm sure there are exceptions, I consider this to be the rich asshole tax. Did some rich assholes make a website somewhere that wanted to get rid of the sixteenth amendment so they could sit on their asses collecting dividend checks and not pay a dime in taxes? Then they create some retarded argument to make regular working people think that they can avoid paying taxes too if only we were to lose the sixteenth amendment? They just intentionally mislead people to get what they want? That sounds about right.