We're always thinking of you guys as socialists.
It's a conservative outfit, so they consider marginal rates the most problematic as it discourages enterpreneurship (the point of diminishing returns). And they do consider the overall tax revenue as percentage of GDP. Government freedom - I'm not sure where you see that. You mean government spending? That should be included, whether the spending is justified or not, it hurts our economy, defense spending does too, even if it's necessary.