The evidence is that tax cuts cause revenues to be less than they would be otherwise, just as one would expect. See the analysis at http://home.att.net/~rdavis2/taxcuts.html.
Your 2 articles do appear to muddy the waters of the argument I mentioned. However, I'm not particularly convinced that they support your point very well either.
After all, it seems self evident that there would be a point of no return, a tax level that would yield peak revenues, beyond which the drag on the economy would cause a decrease. Not that I begin to think there is any justification for a government extracting any kind of peak revenues from its subjects.
Would you do me a favor and describe exactly where you are coming from? I read some of your back posts, most seem to favor high taxation and top down direction of the economy. However, I'm not really ready to assume that those are the things you support.