How high? And how is it a straw man? A straw man is a false argument that someone uses to make another person's position seem weak in a debate. I don't see that happening here. (Except maybe in your post. You're making it seem like the person you're responding to is in favor of doubling or tripling the tax rate or something, when in reality he probably supports a moderate increase.)
> That's why per capita tax receipts have stayed fairly consistent over time . . .
Your link shows the opposite. Per capita tax receipts have grown 250% over the last sixty years according to that chart.
> I don't think we can raise taxes to the point where it would get us out of this mess
How high do you think that is? Right now receipts are well south of 20% of GDP. Currently revenue would have to be doubled, but outlays typically increase and revenues decrease during a recession. If you look at the non-recession tax rates that would be needed to close that gap in, e.g., the Bush years, it would have only taken a 5-10% increase, which hardly seems as outrageous as you're making it out to be.