EDIT: Previous post had the axis backwards.
Here is the correlation between share of income and the share of taxes within the OECD
The US is the point right at the tip of the trend line.
The two upper outliers are Poland on the left and Italy on the right. In any case the US is more or less right on target.
Oh and I know that the lack of any context makes this blog even more insidery and opaque than it already is but, it is what it is. I wanted to make the the point but am trying to finish something completely different.