.....Some policy analysts and non-profit groups such as OMBWatch,[4] Center on Budget and Policy Priorities,[5] and the Tax Policy Center[6] have attributed some of the rise in income inequality to the Bush administration's tax policy. In February 2007, President Bush addressed the rise of inequality for the first time, saying "The reason is clear: We have an economy that increasingly rewards education and skills because of that education".[7].....

...have pointed out that education fails to explain the rising gap between the top 1% and the bottom 99%, which has been the site of most increases in inequality. They point out that if education were to blame, a larger group would be pulling ahead of the rest of the population, and that wages of highly educated earners have fallen far behind those of the very rich. Furthermore, they point out that the U.S. is unique among developed countries in seeing such a sharp rise in inequality, while the composition of its economy and labor force is not - if education were to blame, one would expect the same trend across all post-industrial nations.[8] Bartels has asserted that the skill base explanation is partially used as it is more "comforting" to blame impersonal forces, rather than policies.[9]

The tax cuts have been largely opposed by American economists, including the Bush administration's own Economic Advisement Council.[10] In 2003, 450 economists, including ten Nobel Prize laureate, signed the Economists' statement opposing the Bush tax cuts, sent to President Bush stating that "these tax cuts will worsen the long-term budget outlook... will reduce the capacity of the government to finance Social Security and Medicare benefits as well as investments in schools, health, infrastructure, and basic research... [and] generate further inequalities in after-tax income."...

....In contrast to the claims made by Bush, Cheney, and Republican presidential primary candidates such as Rudy Giuliani, there is a broad consensus among even conservative economists (including current and former top economists of the Bush Administration such as Greg Mankiw) that the tax cuts have had a substantial net negative impact on revenues (i.e., revenues would have been substantially higher if the tax cuts had not taken place), even taking into account any stimulative effect the tax cuts may have had and any resulting revenue feedback effects.[13] When asked whether the Bush tax cuts had generated more revenue, Laffer stated that he did not know. However, he did say that the tax cuts were "what was right," because after the September 11 attacks and threats of recession, Bush "needed to stimulate the economy and spend for defense."[14]

In terms of increasing inequality, the effect of Bush's tax cuts on the upper, middle and lower class is contentious. Most economists argue that the cuts have benefited the nation's richest households at the expense of the middle and lower class,[15] while libertarians and conservatives[16] have claimed that tax cuts have benefitted all taxpayers.[17]b Economists Peter Orszag and William Gale described the Bush tax cuts as reverse government redistribution of wealth, "[shifting] the burden of taxation away from upper-income, capital-owning households and toward the wage-earning households of the lower and middle classes."/b[18]....

http://en.wikipedia.org/wiki/Economic_policy_of_the_George_W._Bush_administration#Tax_policy