Hundreds of economists have signed letters opposing Obama's economic and tax plans (here, and here):
We are equally concerned with his proposals to increase tax rates on labor income and investment. His dividend and capital gains tax increases would reduce investment and cut into the savings of millions of Americans. His proposals to increase income and payroll tax rates would discourage the formation and expansion of small businesses and reduce employment and take-home pay, as would his mandates on firms to provide expensive health insurance.After hearing such economic criticism of his proposals, Barack Obama has apparently suggested to some people that he might postpone his tax increases, perhaps to 2010. But it is a mistake to think that postponing such tax increases would prevent their harmful effect on the economy today. The prospect of such tax rate increases in 2010 is already a drag on the economy. Businesses considering whether to hire workers today and expand their operations have time horizons longer than a year or two, so the prospect of higher taxes starting in 2009 or 2010 reduces hiring and investment in 2008.
Thanks to Greg Mankiw via Tax Prof.

Obama's tax plan will destroy the Social Security system.
Obama says his income tax plan will lower taxes for 95% of Americans. There is just one problem with this, 40% of Americans already pay no income tax. Obama's response to this is that these people pay Social Security tax. Well, that's not income tax, but a contribution to their retirement plan. So if he wins and implements his tax plan, for the first time in the history of Social Security, 40% of the people who will get retirement benefits will have paid nothing for them. Social Security will then loose all pretext of being a retirement plan, and will become a national welfare program.
This will cause Social Security to lose public support in a massive way. Leave Social Security contributions out of income tax plans. If you take some peoples income taxes to pay others Social Security taxes, Social Security will be destroyed forever.
http://strategicthought-charles77.blogspot.com/2008/10/obamas-tax-plan-will-destroy-social.html
Posted by: charles | Friday, October 24, 2008 at 02:01 PM