As I have opined before; a flat consumption tax instead of income tax is probobly a plus, a consumption tax and income tax is definitely a bad. The government is not talking about the 'or/instead' here, they are talking about 'and/both'.
Video embedded below. (from http://www.powerlineblog.com/archives/2009/10/024705.php)
See also Berman Post: Policy Makers Thinking About a National Sales Tax.