Fair point - though Japan is the one country with marginal tax rates higher than the US and it's been in an economic malaise for over a decade. Understanding that taxes and policy often requires trade offs, it would appear that the projected deficits don't take into account any healthcare plan (http://online.wsj.com/article/SB123137375313762735.html), the US obviously has some difficult decisions ahead of it.

PS I don't think you could characterize the OECD to be part of a "disingenuous business lobby" group.