A few quick points that hit my eye:
1) I'd split up the following into two sentences as I think it will "flow" better that way and increase the impact upon the reader:
They warned us that it was our responsibility to keep it that way, but we have strayed from their wise counsel.
Change to:
They warned us that it was our responsibility to keep it that way. But we have strayed from their wise counsel.
2) (AS others have pointed out) - I wouldn't present the text from the founders' point of view. It sounds a bit as if they are lecturing the readership, or even looking down on them because they screwed up the country. Additionally, from a meta perspective, putting words into the mouths of people who died a long time ago might come across as overly confident or even arrogant on the writer's part.
How about writing this from the more inclusive "we" perspective:
The Founders...
...warned of the dangers of excessive taxation. Now we must labor nearly six months of the year to pay our taxes at all levels as the economy ......
3) Below the warnings, it says "For these reasons, We The Founders support the Ron Paul Revolution."
This could be changed to something like:
If (actual names of founders) were alive today, they would support the Ron Paul Revolution.
That is in line with point 2. Also, putting the actual names there would make it more personal.